I've built on all those blanks, the MHX is a good value for the dollar spent IMO. I've done a few batson's and they aren't bad either, well priced as well. I have only worked on one pac bay, I don't know enough about them to give any kind of feedback.
For an all American made blank, have a look at Hydra, good blanks, and for the shameless plug(and full disclosure), 'm a pro-staff builder for them.
What type of rod are you wanting to build for your first? I have blanks and parts sitting around that might fit the bill.