Take a gander at our Frequently Asked Questions section, and you'll find a lot of good pointers and answers to any potential questions you might have.

before someone says "its all in the tune", keep in mind that no matter what you do tuning wise, there are going to be other factors that are going to affect longterm durability and reliability.

common saying is:

Cheap / Fast / Reliable - Pick two.

Dont go by "i'm going to boost 7 psi". Pick a power goal, and go from there. 7 psi on a small turbo is not the same as 7 psi on a big turbo, so choose a power goal. For a non vtec powerplant, 200-250whp is good goal. anything above that and you're going to have to really dig deeper into your pockets (forged internals/head work/etc).

I would personally go with the LS powerplant, the sleeve design in the B20 is more prone to cracking than the B18B in boosted situations. I can imagine you're telling yourself "Nah, I wont boost more than 7-8psi, so my motor will be safe". Thats never the case, trust me, I was one of those people.