I am currently trying the 2510 and I absolutely love it. The sound is detailed and beautiful and it has a great phono stage. It makes you want to listen to all of your music from scratch. The only minusses I can find at the moment that it is perhaps a bit too much for my livingroom (my Paradigm monitor 9 speakers LOVE it, but my neighbours may not, 'quarter to nine' is the max for the volume button for me), and the bass can be a bit 'much'. The song 'Wish I Didn't Miss You' from Angie Stone's 'Mahonay Soul' album has a bass line that deeply purr's into your ears when it goes really low. I will try moving my speakers. Maybe that will help. Maybe I am just too close to the speakers right now.
I read a review of someone describing the sound as 'beefy' and I think that is a nice way of putting it. I tried the Rega Elex-R last week, and compared to the 2510 the Elex-R is 'light' and less detailed. But ofcourse this amp is almost 1.5 times as expensive as the Elex-R. Next week I'll try the Elicit-R.