The best integrated amplifier


Hi All
Right now I am using a Marantz PM-KI Pearl amp to drive Esoteric MG-20 speakers. I feel that a better amplifier would give them a bit more get up and go. I would like to stick with an integrated and have short listed:
Pass Labs INT-150
Moon 700i
Audio Research dsi150
GammuT Di 150
As a starting point for auditioning. Now to the question:
Is there anything else I should put on the list?
Any experience with the products listed would be helpful.
Thanks
zekezebra
Rega OSIRIS ... lots of glowing review out there

demo units for $4,999 (brand new is $9K) currently on E-Bay (US site)
McIntosh MA 6600. Please post your final choice. Love this stuff, a lot of great gear to choose from. Look at the total package. May the blue meters be with you.
I read up on the Rega Oriris. Lots of glowing reviews for sure. However an owner said that you better have warm speakers and it might not do so well with poor recordings. Plus, even though it is a likely a killer sounding unit in the right circumstances, it is not very attractive. Yeah, I admit it, I like looks too.