'Hope I'm not too late to the party. Here are some other choices in the used market that will step things up a notch (in case the JMLabs don't work out):

MA Golds for $400obo:
http://cls.audiogon.com/cgi-bin/cls....oni&1165188134

BW DM601 for $225:
http://cls.audiogon.com/cgi-bin/cls....oni&1165293898
or
http://cls.audiogon.com/cgi-bin/cls....oni&1163134103

Misson 705s for $275:
http://cls.audiogon.com/cgi-bin/cls....oni&1165275382

Onix RS250s for $420obo:
http://cls.audiogon.com/cgi-bin/cls....oni&1164590743

This is just a quick search, but there are tons of others.