if i get a srat with single coils,will it sound good distorted or will i need a pickup change?if i need a new pickup,which ones wood i get to be good for classic rock?

Everyone I know who owns a srat scares me by saying they are meant to be played clean,and i dont like clean...
If you're looking for twangy distortion with alot of high end, the Stratocaster is the way to go.

If you want versatility in the Classic rock genre and a Stratocaster, take a look at Fat Strats.
Schecter C-1 Classic (Antique Amber)
Ibanez JEM 7VWH
Crate Palamino Class A tube combo
Digitech RP80 Multieffects pedal
Ibanez TS9 DX Tube Screamer