What is the next Phono Pre-Amp for me?

An Aesthetix IO would be a very nice phono preamp to have.

It looks to me your system is well matched. What aspect of the sound do you want to improve? If you really want to "upgrade" and if you like the ARC sound, you might want to consider their Reference Phono and Reference II preamp. But they are very costly and I don't know how well they match the rest of your system. You might end up upgrading everything.

What's the rest of your system? Are you sure the ph3se is the weak link? Only a handful will best that one. Some to consider (in addition to yours & your choices) is the BAT VKp10 and VKP10SE, the ARC Ref Phono, Aesthetix, Manley Steelhead, and I'm sure a few others...

What interconnect and speaker cables are you using? An upgrade in cables may improve the sound considerably.

Thanks all! My ARC PH3SE is running well and I am happy with it..however, just wondering what is the next level "up". My speakers are Infinity RS 1-B's and amps are ARC VT 100mkll and Perreaux 2150 for base.
I just upgraded my active servo crossover (big impovement) and changed all my cables (IC) to Acoustic Zen...Silver, Matrix and WOW....This was a major improvement.
Speaker cables are Alpha Gore and I am considering Zen there also. I have not heard the Aesthetix IO (heard good reports on it however.....or The Groove or Herron.....just interested in what the next level up would be?