I haven't heard your luxman but i suspect it's pretty awesome. i believe it's phono stage has low output MC capabilities. You might mos def wanna experiment with a few LOMC carts. I also upgraded from rotel amp/pre to a tube based amp/pre. I have found the most dramatic improvements in my system were mostly at the front end. also i agree with noromance about cables (solid core) and good support/damping for your tt.
What is my weak link?
I just upgraded to a Luxman SQ-30 tube integrated. My turntable is a Thorens TD 146 (auto stop/lift). Stock tonearm with Denon 110 HOMC. Speakers are Dynaco a25XL (recapped). I realize that the Thorens was entry level (in 1983 when I purchased). I think system sounds great, but, I have only old integrated to compare (Rotel don't recall the model). If I were to upgrade, should I start with TT or speakers? Or, keep what I have and use $ to buy more records? I know you guys hate these lame questions. But, I had to ask.