Best preamp for atma sphere m60 under $3000 used?

In my opinion, you couldn't do better than the combo of the BAT VK-31SE (used ~$3000) and the M60.

Tvad,

The third finger goes to Allen Wright's VSEI RTP5, which I have not heard.

Can anyone comment on bat's vk 3ix?
I read somewhere in a review it's good but lacks that last bit of transaprency.
If that is the case I will pass on it.
I forgot to mention I like to make lasting purchases, hence the million questions on matching preamp.
Also I really want to stick with true balanced design and would prefer to have remoted unit.
Also am considering the arc ls17 or cary slp03.
Out of all of these the mp3, arc ls17, aesthetix calypso, cary slp 03, bat vk 3ix, Jeff Rowland Capri, Pass x? Which one will give me the most?
Or should I wait and save up for the mp1 and live with my sim p-5 which I admire very very much?

If it were me and this was going to be a lasting purchase, the MP-3 and MP-1 would be the only preamps on my list.

As much as I admire the K&K phonostage, the benefit of consolidating the preamp and phono, along with the synergy between the preamp and amp, would be hard for me to pass up.

Just to put it in perspective, if I hadn't gotten a good deal on my VAC amps I'd be listening to the M60's and MP3.

I have not heard the Atma pre-amps, but I owned a BAT VK-3i. Unless the 3iX is 2 or 3 orders of magnitude better than the 3i, I can't believe it is playing in the same league. The 3i is IMO, the best balanced unit available for anywheres near the price, but it was easily bettered by First Sound and Joule (single-ended), and VAC Ren (balanced).