Basic integrated amp for $700-$900

Pre-owned Exposure 3010S

Yamaha A-S801

Teac AI-1000

Pre-owned Sony TA-A1ES

I see that "Uncle Kevin" has bought up all remaining stock of the Musical Fidelity M2si and is selling them at a close-out price. At his close-out price, I think it would be hard to beat the M2si if it meets your needs for features and power. Otherwise, with a budget of $900 or less, I would probably look for a quality used integrated amp that originally retailed for $1500-$2000, but is for sale used at approx. 50% off the original retail.

I’ve gotta recommend Anthem I-225.  They’re great and I just picked mine up for $500!  Usually they’re around $800.

A few others...
-Nu Prime IDA 8 (Used)
-Peachtree 220 (new from Underwood hifi)
-Rogue Audio Sphinx (used)

I can vouch for the Vincent as I recently purchased that same amp, have had it a couple of months so far.
I think it sound great and is driving Martin Logan Motion 40's at 4ohms just fine, puts out around 80 watts with those speakers.
I was initially thinking it would not be enough power but I was pleasantly surprised that it's enough power for me and does not get that warm either.

I also like the looks of it.
My only gripe, when you turn it on, the volume knob has a red indicator that blinks as the tube section warms up and then the indicator turns off. I wish it would have stayed on so that you can have some indication from across the room as to what position your volume is at.

I don't use the onboard DAC as I have an external one.