I have both and actually prefer the K271 over the M50. The K271 provides better detail and the M50 has too much bass for me.  I can understand why people would prefer the M50 as people also prefer Bose and Beats because they like that big boomy sound.  Different strokes.

I liked the Gilmore Lite with the K701s.  If you can spring for another $50 you can pick one of a few AMB M3's on the for sale side with upgraded power supplies.

Seller has been banned so I doubt you will get a reply.

I can't comment on the Concerto but I've had the Opera and GS-1 and greatly preferred the GS's clarity. The waiting time for one to be built or listed is tough to endure but it is worth the wait.

The Glite and M3 are pretty much equivalent as has been previously stated.  The GS-1 has a little more power and gives it some depth, a GS-X is just overkill for 701s.  I'd tend to agree that upgrading your source would give you the most benefit from what you've settled on so far.

XLR is generally used for long cable runs because it the signals put down the two lines are positive and negative signal which makes it noise cancelling.  A single ended signal and constant ground doesn't have that characteristic and changing the termination at the ends of the cables doesn't do...

Adam bought a Mini3 amplifier from me.  He paid promptly and it has been a pleasure doing business with him.  I hope we get the chance to do so again, easy Canadian sale   Thanks Adam!

Ditto, I got one for home and liked it so much I bought one for work too.  When I get paged in the middle of the night that backlit keyboard is a godsend compared to being blinded by an overhead light after a deep sleep.  The keys are a joy to type on; I thought I'd always want the full range...

Henry purchased a Glite+DPS from me.  He is a pleasant person to chat with and paid for the purchase promptly.  Can't say enough good things, thanks for the interest and enjoy the amp Henry.