Emu XL-7 & MP-7 User's Group

Now that I have a new Mac G4 Powerbook, I'm looking for sequencer software to use while 
I'm traveling.  I'd like to create on the road, then dump everything into the E-mu for 
further tweaking.  I'd also like the capability to use .wav files and be able to edit those.

Any suggestions?  I'd like to keep the cost under $150  (if that's possible!)  Also, the 
software has to be OSx-friendly.  I've done some searching, but nothing solid so far.  Also, 
The Garageband and iDrum apps are fun, but don't meet my needs.

Thanks in advance,
Mike