Used Preamp on a budget advice please.

I’m currently running a top of the line Yamaha AVR as my preamp in a system consisting of a Threshold S500/II, B&W 802 S2 and B&W 801 S2 speakers, which I swap from time to time. I’m also just using a Yamaha DVD player as a CD player, but am planning to buy an older, higher end CD player as well. I also use a PC with iTunes running to an Audioengine D1 DAC. I also have a Pro-Ject Debut Carbon turntable and would need to a phono amp for the products listed below.

I’m going to add an older preamp (with remote) for 2 channel to try to extract more definition, depth, etc, and to try to warm up the sound (the plan is to add a passive, high quality RCA switch to choose between preamp and AVR). I have a limited budget of up $700 and have been doing lots of looking. It appears that for my budget and need for a remote control, older pre/pro’s may be the best approach. I’m curious if anyone has any advice, opinion, or ideas on my approach and the following preamp possibilities:

Classe SSP-300
Classe SSP-75
Classe SSP-30 MK II
Cary Cinema 6
Simaudio Moon Stargate
Parasound C2
Krell Showcase PR
Krell KAV-250P

Thanks!