Try experimenting with different upgrade AC cords; there's no mention of cable tweaking above so I don't knoiw if you've tried this yet, but never underestimate what cables & tweaks can do for you. You'll never know the full capabilities of your existing equipment until you thoroughly investigate further. Might already have all that it takes, but you just don't know it yet...
Bigger Amp?
I am considering an amp upgrade and would appreciate some (friendly) advice. I am currently using a McCormack DNA-125 to power a pair of Audio Physic Spark III's and although I really like the McCormack, I am looking to add a little more warmth and presence to my system. I have heard some say that a more powerful amp will add more presence, even at low volume. I prefer to stay with SS since I can't afford to buy/maintain a good tube amp. Can any of you big SS amp owners attest to what more power will get me (if anything) at low volume?