Simon, whats your handicap? People buy drivers because they see someone else killing theres. Its all about your swing path and speed.
Whats almost as important as the type of driver is the shaft you put into it. For the higher handicap golfers the New King Cobra is very forgiving and goes a long way. Its made for a swing speed between 85-95 mph depending on the shaft.
I have been a huge advocate of Cleveland all my Irons and wedges are Cleveland as well as my driver. My advice is Demo a few and see what you think. It took me 4 drivers to figure out the new Ping G10 was for me. Absolutely love it. Its a lil pricy but think of it as an invesment, you will have it for at least 3-4 years and whats 300 bux over that long a time. If you buy cheap sh-t you get what you pay for. Especially with golf clubs.
If your a regular golfer the way to go is demo, like anything else it has to feel good and look right when you set up to the ball.
I have a regular guy that plays the TaylorMade DRAW and he is in the market for a new driver already, that doesnt mean you wont like it. But theres a reason why all of them are on sale.