6er has been around for a while. BMW might probably be thinking of the next gen.

i'd say m3, but seeing that you're still a kid, you'd be safer in a 320i, tbh. if i had anything more than 2.0 when i was your age i'd have been wrapped around a tree.

it could be a troll thread.
however, of course ppl should care abt fc and maintenance, even though it's sponsored. it's still money, and it still has to come from somewhere, and chances are, it's not unlimited.
my petrol is completely taken care of by the company, but i still watch the fuel consumption gauge and try to drive efficiently when i can.
my maintenance is completely taken care of by the company, but i still shop around for places to fix the car at a lower cost, and have opted to ditch the more expensive runflats. i have a mental image of how much fuel i use a month, and i've been hoping to keep the maintenance budget under 10k for this year, but i've failed miserably there cos it's over budget and it's only april now

fc/maintenance/road tax/insurance/loan repayments... they're all valid points to consider when choosing a car.
but really, i'd rather google everything up instead of asking it in here, or i'd try the bmw forums instead.

srsly, this is not too far-fetched, there are a lot of people in this country with money.
heck, even i've had the pleasure of having some cars i've probably shouldn't have had before my time.

now, the E63 6er came out in 2003, about the same time as the E60 5er. we know that the F10 5er replacement is coming out around 2010. one can assume that the 6er replacement would be around that time, and indications are around 2011. mules are already being tested.

so consider that the car will be current only for the next two years, and if you intend to keep it for a decade, you'd be having the previous generation for the 8 years after that. and also that the E63 is kinda fugly haha.

also consider that the 645Ci road tax will be quite hefty, and I've had a car with the exact same 333hp v8 inside, and it's an engine more suited for cruising around gt style, crossing continents in a day, and not really vroomvroom m6 style. I've also had a car with the same engine as a 630i, which really should be quite sufficient actually, if a tad bit underpowered.

but yeah, the advice i'll give you is exactly what i stuck to when i found myself in a position kinda similar to yours very recently:

1) buy european
2) buy a new updated model early in its lifespan
3) buy for classic looks, not for cutting edge
4) buy for reliability, reasonable cost and ease of operation

i very almost picked out the new m3. even now, i'd absolutely love to have it. but there are so many other cars out there that are worth looking into, so why don't you have a look into them.

1) don't think of all the hype when testing cars. don't think of what other ppl say, just make your own assessments about how it drives. what clarkson and all the other wannabe-clarksons say are only guidelines, and not rules to be adhered to. after all, when you buy a car, you buy it for yourself, not other people.

2) a 6er looks way more middle aged than a 5er i think. but really, other ppl's misconceptions about how old a driver should be when driving a certain car is crap, and it should not matter. so disregard what i say when i say the 6er is fugly haha.

3) you're 17, young and impressionable. you want people to look at the car, and what ppl think about the car and about you is important to you. just remember, when you buy a car, you buy it for yourself, not other people.

word of caution though, especially about high speed action: m cars and 17 year olds aren't always happy stories. you can google around for that 17yo that killed himself and 3 other buddies in his dad's m5 on some runway in the states.

not even 80km/h. back when i was OP's age, i was a bit more inexperienced, and a lapse in judgement/concentration led to me accidentally hitting the kickdown switch on the SL. mid-turn. in the wet. luckily the playstation/gran turismo skills kicked in instinctively and i opposite locked my way out of that, but damn was i close to planting the car into oncoming traffic. i was doing 30-40km/h, and not in control of the car, and the oncoming cars about 60km/h, so you can imagine the sum of all speeds involved would mean some wrecked cars.

anyways, no adv driving course or training can prevent recklessness, that is the driver's prerogative to use good judgement. also being on the roads every day is a adv driving course in itself haha... good luck OP, there's been some very good advice here interspersed with the trolling.