find that 10's are a bit limited for my tastes, tbh with your budget you arent going to have a problem! the fronts will take slim fit 5.25's and they sit in behind the cards with no chopping, the rear i think are 4's or 4.5 i think, go to any stereo stcokist, should have a book listing the standard sizes for speakers!

saw a nice speaker package in motor world yesterday, its around £180 for sub box and amp, sound nice too, that or ebay m8