PV-10, PV-11, PV-12, SFL-1 Sig or LS2? Help

I'm looking to sell my SS preamp and move to a tubed pre. I don't want to spend any more money than I am likely to get for my current pre (ARC LS-9) which is probably in the $700 range.

I'm looking for something that will be pretty euphonic, but not overly so.

All of the preamps that I have listed above can be had for the same or less than $700.

Even though my amp is tubed, it tends to be pretty analytical, so I'm looking for something that'll kind of "smooth" things out.

Here's the rest of my system for reference:

ARC CD-2
MSB Link DAC III with P1000, ModWright mods, Upsampling (Just purchased on the 'goN last night.)
Pre (to be determined) currently LS-9
ARC D-115MK2
Magnepan 1.6/QR

Thanks in advance for your help!