Black Ice & their predecessor Jolida were always a budget tweaker option. I picked up a Jolida integrated amp a years back to test out tube sound on the cheap and learn to fiddle with upgrades. The one thing I didn't upgrade was signal path resistors, but I did almost everything else that was easy. KLE RCA plugs, KLE binding posts, Mundorf Supreme caps, hexfred diodes, Alps volume pot, NOS small tubes and PSvane EL34PH power tubes. The upgrades far outweighed the cost of the unit and the quality it deserved, but I did it for learning and practice. Point being, the sound DEFINITELY improves with each upgrade. It's still not the best, or the quietest, or the cheapest option, but it does pack a hell of a good time into an easy package. Worth playing around with if you're the tinkering type.
-Lloyd