Hi Jason.
haven't used those amps specifically but I owned a Mesa m-pulse 600 for a while. The sound was nice. I just sold it and got an Aguilar AG500SC a couple of weeks ago. Real nice amp, but it is up for sale. I've decided to bite the bullet and go with a Crown power amp and a pre amp. Had a set up like that some years go and loved it. Running the whole works thru two Aguilar 112 bottoms and a Bergantino 4X10.
My only suggestion is, if there is a way for you to play on those amps you are looking at, that would be a very good thing. Sound is such a personal thing.
Guy
BatB 2007
BNC VII 2005
BNC Reunion 2008 & Wooten Woods Weekend