I am with Piru: Devpac 3.18 is the best assembler IDE ever written for the Amiga.
Regarding vasm: vasm 1.4a will be released soon (as part of vbcc 0.9a).
vasm is now fully Devpac compatible; it offers the support for Devpac used options but that would require to specify the '-devpac' switch on the command line.
I am currently moving from Devpac to vasm because vasm supports different processors in contrast to Devpac which is only m68k. vasm is slower than Devpac and when using the preassembled include file for Devpac vasm is even slower. I personally don't care much about this fact because the machine I am using is fast and vasm finds more things to optimise than Devpac.
If you need an IDE go for Devpac 3.18.
If you don't need an IDE I would recommend the duo vasm 1.4a and vlink 0.12e (as part of vbcc 0.9a distribution).
PhxAss, although still useable, should be only considered for unexpanded machines due to its modest requirements.
Regards
