Mike,
I have four of these EJ20 rebuilds going at all times, on top of allot of EJ25 rebuilds. Subaru cranks can't be turned for a variety of reason. First and foremost they are already pretty small in diameter. Secondly finding a shop setup for them is a challenge even if you wanted to. The small journal diameter would require a shop to have a wheel setup specifically for the boxer engines. Pretty much assume the crank is junk. Even the new cranks are on the skinny end of the spec from the box. Also be sure to not reuse the oil cooler. Generally speaking I bypass the cooler after a rebuild. They do not flow enough to do much more than help cold starts. Very simple to bypass, all the parts can be removed from a N/A suby. Head bolts are another issue with the build, for the small additional cost it's great insurance to go with ARP's. Truly a night and day difference. If you are going to do all the work your self, I would put the saved money to a new crank, good bearings & studs. Your goals of 800.00 will be cutting it close.