What medium priced amplifier is best with vinyl?

I am looking for a new amplifier for my system. I have a VPI Scout TT and Monitor Audio RS6 speakers, among other componets. I am mostly into vinyl and am considering a Naim Nait 5i, Simaudio Moon i-1 or used Moon i-3 or i-5. Also Roksan Kandy... Tubes interest me but I've never used them and am not sure what direction to go. Any suggestions would be greatly appreciated.