I cant tell you which kit/turbo to go with because its merely opinion on here, but...
IMO- start buying everything- be it a full kit, fuel pump, lines, fittings, etc AND buy the rods/rings, HG, etc BEFORE you put it all on. Its not a question of running a bt kit on stock internals. Its the premise of having to do things 2 times instead of once the right way. A few points on this:
- Taking the time to buy all of the parts and lay them out before you install will give you good perspective of how the kit will install, and anything else you might be missing. The last thing you want to do is put things in, then say wow i just found out they make a manual belt tensioner, and want to tear down stuff to put that in as well.
- Taking the time to buy all of the parts will also give you extra time to find out who else has done a setup similar to how you want it, and contact them and suppliers as well.
There is really no use of slapping BT parts on a car that will just be torn down again and built up. Yeah you can run it conservatively, but then whats the fun/point in that? If you wanted to keep the stock internals and just run a 28rs or k04 hybrid, id say go for it. But take it from a guy who built up and tore down his motor 3 times before i had all of the parts in there. Hope that helps and good luck