If you go the xcal route (sounds like you are leaning that way) I would highly recommend joining the excalibur forum. There are a ton of guys on that site that know a ton about every model and will be able to answer any question you can dream up.
I know a few people with micros and most of them are getting 345+ fps.
Edited by Hirogen (05/15/15 09:01 PM)
Never violate a woman, nor harm a child. Do not lie, cheat or steal. These things are for lesser men. Protect the weak against the evil strong. And never allow thoughts of gain to lead you into the pursuit of evil.
-The Iron Code of Druss the Legend