My best advice is to do everything through one shop so they're responsible for everything. MAP puts together nice blocks and heads. For what you're looking for, you should be just fine with a 9.0:1 MAP Stage 1 2.0L and a head rebuild with some mild porting. Your current valves can most likely be reused unless they're damaged, but they'll replace the guides and seats with the rebuild. While they're in there also get some upgrade beehive springs. MAP will worry about the overbore and crank; depending on the condition of your core they'll machine appropriately. Do NOT reuse your ARP headstuds, despite what you've heard they are once time use only and you do risk failure by reusing.
Check out this build thread for an almost entirely MAP setup I'm currently working on:
http://www.mitsustyle.com/forums/sho...=29098&page=12