Following up on Sfar's advice -- you can get some of the tube magic by mixing a tube preamp with a solid state amp. Solid state amps like McCormack DNA-125 with high input impedance generally offer best match for tube preamp -- I've owned a DNA-125 with conrad-johnson (PV10 and PV12) and Eastern Electric Minimax tube preamps -- really nice combinations, both musical and powerful. I'm not sure how well your Aragon amp would get along with a tube pre.
Another suggestion -- buy a used Naim Nait 5i integrated -- see Robert Harley's Absolute Sound review, which gets it right (google "naim nait harley review" and go to the PDF posted by one-hifi dot com). I have been very happy with my Nait 5i -- it has changed the way I listen to music. I'm no longer constantly trying new combos of amps and preamps -- just enjoying listening because it sounds right. (I've owned Creek integrateds, but the smaller ones, not the Destiny, so I can't compare to the Nait 5i.)
Another suggestion -- buy a used Naim Nait 5i integrated -- see Robert Harley's Absolute Sound review, which gets it right (google "naim nait harley review" and go to the PDF posted by one-hifi dot com). I have been very happy with my Nait 5i -- it has changed the way I listen to music. I'm no longer constantly trying new combos of amps and preamps -- just enjoying listening because it sounds right. (I've owned Creek integrateds, but the smaller ones, not the Destiny, so I can't compare to the Nait 5i.)