Reply to Questions about Scratching with Traktor.

Hey, I've been Djiing for some time, I have a Kontrol S2 with traktor Pro 2 but I've always wanted to do some real scratching with turntables and stuff...
I'm believeing about buying turntables, I'd really like some Technics SL 1200 but I don't know if some other good turntables, maybe a bit cheaper exist. Do you know some?
Plus, I'd like to scratch with traktor and use the S2 as mixer for now before buying one, but I don't know If I can use the traktor scratch expansion kit with my S2, can I? or Should I directly buy a mixer?
Thanks for your help.