Thanks so far for the positive response guys!

For anyone who wants to know how much it is, I can tell you that it'll be roughly £7,500. You never know until you've finished, but you can see the costs I'll incur
here.
I also have a question. How much (if any) time do you spend in sims? Would you say it's useful to become competent in them?
Have you actually been up yet?
I've played a lot of Flight Simulator in the past. In fact, many moons ago, it was FS98 that got me interested in flying. I was stuck in my dad's office one day and his colleague set me up with the game on the default settings (at Meigs Airfield with a little Cessna). So from then it's been something that I've always been interested in doing, and a gap year, where I've had time to earn the money is an ideal time.
As KatanaDV20 said, the sim is only so helpful. Without it, I wouldn't know half the stuff I know today (bearing in mind this is pre-PPL). The sim has given me a basic understanding of the instruments you'll find in the cockpit of a light aircraft. Flying on VATSIM (sort of like FS multiplayer) gave me an insight into the radio communications side and things such as circuits. So I wouldn't say that sim has been unhelpful, but as KatanaDV20 was stressing, flying VFR (visual flight rules as opposed to instrument flight rules) requires you to look out the window, and be able to keep the plane straight and level without looking at the roll indicator or the vertical speed indicator.
I have been up in a couple of light aircraft including a C172 (4 seater) which is what I plan to be flying.
Are you planning on just doing a PPL or are you going all the way to fATPL? If so are you planning on then converting it back to a European licence?
Although I'm going to the states, I will be completing a European course (therefore ending up with a JAR-FCL PPL).
At the moment, I'm not sure how much further I'll take it. I reckon for now, my PPL will be sufficient. However, I then have the option for any sponsored cadet programs (if any exist in a couple of years). I'm going to uni in October anyway.
Congratulations! Any reason you're doing it in the US? Make sure you budget for a few hours when you get back here to get up to UK standards.
As you mention the regularity of which I can fly is a big bonus for me. I mean, look out of your window tomorrow morning (assuming it has snowed like it has in London), and then you'll see my problem. If you look at the page
with the cost comparison you'll see that it is in fact a bit cheaper. (If you notice I haven't put flights out there, it's because luckily I get free airmiles flights).
Thanks for you note about budgeting for some hours back here. I've heard the airspace over here isn't quite the same as in the States!