I haven't sat down to plan out what I need for head work, but I've spent a lot of time on the block. Personally I'd stay away from a 2G piston setup for what you're planning on running. It's not worthwhile with the power you're hoping to run.
For my 1G I'm planning on polished eagle rods, ross pistons, clevite bearing all the way around, and having a local shop assemble it. The prebuilt blocks are great if you're in a hurry, and have the cash on hand, but if you shop around and have a local shop do the work, you can save a good bit of money. I've got a total under $1400 so far going this route though I'm considering a 2.3L setup instead which will jack it up around $2500.