Should I play Witcher 1 and 2 first or will I do just fine with the witcher 3's story?

You should play Witcher 1 and Witcher 2 first.

It will provide a lot of back story leading to the Witcher 3.

I see. Good thing I bought the bundle during sales. Will try to find time to play it. Thanks

Should I play Witcher 1 and 2 first or will I do just fine with the witcher 3's story?

The Witcher 1 takes a lot of time but worth it. Can get boring in the first 1-2 Acts, can't remember. Gets way better after certain part of the game.

The Witcher 2 is definitely worth playing through. Combat is more of the action type.

As such, you can probably wait for sales on the Witcher 3 as the Witcher 1 and the Witcher 2 would probably take around 20 hours to complete each.

where got 20 hours only, more than that definitely 

I spent over 80 hours on Witcher 1. I haven't start Witcher 2 yet but I heard is short so gonna start next month and still with plenty of time left. With the scale of Witcher 3 I can imagine over 200 hours.   

Which act are you in for the Witcher 1? Did you play continuously (I mean without switching to other games)?

In my case, if I do switch to other games middle of the game, I would slowly forget about the story.

I play continuously. It took me quite a while to start past the village on act 1. Stop playing for a few months forgot the controls , forgot whats it is about and replayed from the start. From then on I never stop. It is a great game.

Where are you up to in the Witcher 1?

It gets way better around Act 3.

I spent over 80 hours on Witcher 1. I haven't start Witcher 2 yet but I heard is short so gonna start next month and still with plenty of time left. With the scale of Witcher 3 I can imagine over 200 hours.   

16 extra content packs coming free for everyone!

The Witcher 3: Wild Hunt, the RPG epic with a mature, non-linear story drawn from player's decisions, a vast multi-region open world acting like a living ecosystem, dynamic and tactical combat, and stunning visuals, is now available for pre-orders, up to 20% off (including special loyalty discount), on GOG.com! The game comes out on February 24, 2015, but it's today that CD PROJEKT RED & GOG.com would like to announce that it will be followed by 16 DLCs available to all gamers, regardless of their platform of choice.

Why are we doing this? Here's an open letter from someone many of you know quite well already, Marcin Iwiński, co-founder and Joint CEO of CD PROJEKT RED:

We love games. We love collecting them, playing them, and everything connected to that experience. Every time we reach out for a new release, we expect to be taken care of. We expect support if we encounter any problems, we love updates constantly improving the experience, and we feel really special when we receive free content that gives us more than we initially paid for. It doesn't have to be huge, it can be an awesome skin for a character, or an extra sword, or armor.

Unfortunately this treatment is quite rare these days. As gamers, we nowadays have to hold on tight to our wallets, as surprisingly right after release, lots of tiny pieces of tempting content materialize with a steep price tag attached. Haven’t we just paid a lot of cash for a brand new game?

As CD PROJEKT RED, we strongly believe this is not the way it should work and, with The Witcher 3: Wild Hunt, we have decided to do it differently. Cutting to the chase, everyone who buys Wild Hunt will receive 16 specially prepared DLCs absolutely for free, regardless of platform. You don’t have to pre-order, you don’t have to buy any special edition to get them -- if you own a copy of Wild Hunt, they’re yours. This is our way of saying thank you for buying our game.

There you have it, folks! There's very little to add to Marcin's words except: Pre-order today, and prepare for an RPG experience worthy of the best traditions of the genre, and taking it to a whole new level! The Witcher 3: Wild Hunt is available up to 20% off, packed with bonus content on GOG.com, and will receive 16 free DLCs after release. Check out the pre-order page for the bonus content details and your local pricing.