Looking to upgrade my preamp, suggestions?

@rwwear
You are correct, the ARC LS2B IS an excellent preamp and one I have enjoyed for near on 4 years but it was time for a change and convenience.
The ARC is now for sale right here for much less than I paid so hopefully somebody will snap it up, enjoy it as much as I did and get themselves a very good buy in the process!

 Had quite a few hours with the C48 now and can sum up a little better.
Life with the LS2 was good but cd fed through its balanced inputs always sounded just a little forward, bright and aggressive, not terrible but compared to vinyl fed through rca it was very noticeable. The vinyl always sounded rich and warm and highly detailed.
Well the c48 manages to pull that off with every different input whether it is cd through balanced, vinyl through rca or the bluesound vault2 through digital coax. Everything sounds very warm and natural, very highly detailed and one track in particular I was listening to last night by Rush ,with my eyes closed ,startled me as it sounded like Geddy was singing to me personally over my right shoulder!
So far I am of the impression that the C48 is doing what a good preamp should and that is imparting negligible  sonic influences on the actual music.
Combine that with all the convenience factors of built in phono, headphones and 4 digital inputs and I would say I have just what I was looking for.
Oh and the remote, keep my backside in the sofa now!

If you keep the LS2, try a Mullard 6DJ8 in it. If it sells, an LS26 just came up on Audiogon, asking price $2750. It uses the 6H30 tube.

Classe CP-800. Loving mine. So versatile and it gets out of the way of the music. Doesn't have a "sound", so if that's what you like it's a good investment.