When should I get my turbo?

thanks, that's just the info i needed, now I just need to save up for all the stuff i want

well i'm aiming for 300bhp and I was told I'd want the fuel rail after i got over 230 so i might aswell just get it with the other fuel components and then i don't have to worry about it, not too expensive (the AEM one) anyway.

I think i'm starting to build up a reasonable knowledge of the parts surrounding the turbo but I don't know much about turbos themselves, I keep hearing talk of T3 and T4, what does this all mean? Basically, which turbo should I go for? bearing in mind the power i'm looking for

thanks again