Not gonna lie, when noobish questions like this come up that are easily searchable and has been gone over many times before, and makes more than one thread w/ the same question, there's bound to be some banter and bashing. It doesn't help when latley it seems like everyone is bleeding out of their vag's. Just my thoughts though, don't ban me
On to something on topic...... For the amount of information you seem to have on turbos, and even your car in general, I think you need to do some more research on your own first before you size a turbo for your car (or ask everyone else to do it for you). Look at other people's set ups, check out tuning software, see what a new turbo actually takes to be ran correctly without toasting your engine, and for god's sake, use the search function and google. There's no need to re-invent the wheel here. If it's a DSM, it's been done, so I'd suggest checking out setups of other guys that are running the times you are looking for