I've had the 2.5 for quite a while. I have used various solid state amps and rolled quite a few tubes in and out of the 2.5. I currently have NOS RCA Clear Tops that sound amazing with that Pre. I also own a 5.5 that I use in my main system. I have tried Tung-Sol, Mullards, JJ's, Electro Harmonix, and RCA's sound sweet to me(IMOH). I have used Parasound 2200, Aragon 8008, Conrad 2500 and McCormack DNA-1 Deluxe and DNA-225(current) SS amps, and tried VTL ST-85 and 150 tube amps. I find the DNA-225 with my Maggie 3.6's works for me in our house with rock and Jazz we like. I think you'll enjoy what you bought. Good choice. Have fun....