Worth a try, although don't know how it would stack up against your current amp. Very happy with my one, and I have some petty fast kit pushing it out to it's limits. Very articulate and precise amp. I've never had anything about it to complain about anyway, and have heard of many people who got rid of one only to regret it! As long as it's working OK, give it a go, and sell if it doesn't suit your taste.
If you can get it real cheap, you are doing yourself a favour (assuming it matches your kit, which is by no means a certainty). I have one paired with the CD63 KI Sig and they sound great. Second hand they cost well under £500 and to my ears at least give their £3k equivalents a real run for their money.
If you buy it, I doubt you will sell it on at a loss if you are unhappy with it when part of your system.