Hi everyone, I just purchased a set of CBM-170's. They are my first hi-fi speaker purchase and I love them. Now I've got the bug and I want to upgrade the amp. I'm currently using a SMSL-50 T-amp from amazon for 60 bucks. The little thing is great but I feel like I could get more out of these speakers. I will soon have $1000 to spend on an amplifier and I would love some suggestions.

I'm would like a Tube preamp with either a tube or SS power amp to go with it, I'd prefer used gear because I hear that you can get much better stuff for around the same price as new if you're patient. Honestly I don't know where to start. I've heard that getting a good tube pre will give the most noticeable increase in sound quality so I'm thinking I could spend $2-300 on a decent power amp and $7-800 on a nice tube pre. If anyone has any suggestions for older models or things to look for I would be most grateful. Cheers!