looking to get a supra

[jslice13]

so i'm looking to either get a stock single or stock twin turbo supra but im not sure which one i want right now. eventually i would like to upgrade it to around 600rwhp or slightly more and im wondering whether the single turbo or twins would be better for this. also, is this amount of horsepower still ok for daily use? thats what i was hoping for with just casual streetracing. which one would be easier or cheaper to upgrade? from what i read i think the stock twins bpu would bring it up to around 400 horsepower but what about the single? i also think the stock tt is good for up to the horsepower im eventually hoping for but is the single turbo? last one, is buying a stock single turbo cheaper, on average, than a stock tt?