Jafant, no, Krell does not service any of their old CD players, as they don't have parts (usually laser/transport.) That should not scare you however, because you can usually find the parts online with a little diligence for a reasonable price, and there are plenty of technicians out there that can service Krell products.
Tatoo, considering your system, if I were you, I would look for a Krell KRC preamp. I may consider a KRC HR, but would probably pursue the original KRC. Your ML preamp is pretty awesome, and might be fine for your system. The KRC is equally awesome, will likely be more synergistic in your system, and matches your KPS 20i. Lol. You've obviously put a lot of effort into your system, aren't you curious to hear what an all Krell (excluding speakers and cables) system can do? A used KRC should be about $2000, try one for a few months and sell it if you prefer the 38s in your system. Or sell the 38s, either way, you should break even overall.
Tatoo, considering your system, if I were you, I would look for a Krell KRC preamp. I may consider a KRC HR, but would probably pursue the original KRC. Your ML preamp is pretty awesome, and might be fine for your system. The KRC is equally awesome, will likely be more synergistic in your system, and matches your KPS 20i. Lol. You've obviously put a lot of effort into your system, aren't you curious to hear what an all Krell (excluding speakers and cables) system can do? A used KRC should be about $2000, try one for a few months and sell it if you prefer the 38s in your system. Or sell the 38s, either way, you should break even overall.