my opinion,

1. not yet
2. good enough for city driving and doesn't feel underpowered when driving on highway for long distance
3. look for Motorman / Buydirect in gs, sure best deal and services
4. locked satellite within 3 seconds (i'm using papago x8.5)
5. not yet

it's DIY, ahem 

outdated map and less POI, navigation system is kinda confusing for me, dunno about other drivers

Everyone's definition of underpower is different. Some may say Range Rover Evoque is underpower. CR-Z underpower. Camry 2.0 underpower.

To me anything sedan size of C-Segment with 1,600cc N/A to carry 4 passengers driving up to Genting is considerably underpower. You need to rev the engine beyond 4k rpm to get some pick up after speed bumps towards uphill because of its limited peak torque.

If you concern about the power of your car to drive up Genting with alot passengers very often, I suggest you look for turbocharged comfort based car like Ford S-Max, VW Golf TSI, Proton Preve CFE.

Mine got no major problems on my 1 year and a month old 2.0SX. Except that I had the "check engine" indicator light on December last year. Car hibernated in SC for more than a week for endless series of drama from SC. Now so far so good.

With regards to Kia Rio, my ex-gf has it (eh hem).. Drove up to Genting at 120km mileage. I found that acceleration can cope well with other 1.6 and 1.8 cars with 2 person on board. It drives as well as Forte in terms of above avg handling & good NVH from ride and engine. Of course if you have more budget to spend, 2.0SX is more fun to drive because the torque is stronger and it makes a big difference in driving feel.

Generally people will choose to get Kia Rio because of its short dimension for easy parking, sun roof, projector headlamps, "rare" and one of its kind bread and butter sporty looks small hatch. Ford Fiesta and Mazda 2 still can't beat Rio's eye catching design with ample seating space for 4 or 5 with a little squeeze.

I will suggest you to test drive second round with Rio and observe much more in detail at different road and driving conditions. Rio is still new in Malaysian market and Forte soon will be replaced with new Forte K3 by early 2014. If you still find the car perform abit sluggish to your liking, maybe VW Jetta TSI or cheaper Proton Preve CFE is a better choice.

If its not too much to ask, would you be kind enough to list down in point form the problems which you've heard affecting the Preve?

I know this is off topic (that this is a Forte thread), but I'm just curious to find out. Thanks.

if u have budget and can wait, u can wait K3, if naza no cut down the thing and same spec with korea, i think is very good car, oversea review is good on this car, many nice feature, problem is the price should be 98K and above, price is according to naza kia technician comment. k3 engine is new GDI engine, look like better and is latest engine