I've seen a lot of good advice here especially regarding roomtreatment and vibration control. After that's taken care of my guess is that either splitting off your pre-amp functions to a good unit - tube or solid state- will make a really big difference. If you're not ready for that step, then a speaker upgrade will also make a tremendous difference. I've had a Micromega stage 2 for 5 years and while It's not state of the art, my feeling is the gap is not as large as some would like you to believe. I swapped in the Meridan 508.20 recently, and while it was better, the change was minor compared to what adding my Audible Illusions pre-amp in place of my intergrated's pre(WOW). If your Sim is better than my Arcam 9 was, then I'd start with the speakers.
Best upgrade for the money ?
My system is currently comprised of a Sim Audio integrated amplifier, Micromega Stage 2 CD player, and Polk speakers. I'd like to improve the overall sound of my system but don't know where to start. I have good not great interconnects - Wireworld. My speaker cable is MIT(again better than average). I'm using the power cords that came with my equipment. Can anyone suggest where my money might best be spent to upgrade my system. I guess what I'm asking is what would have the most impact for say 500 - 700 dollars. Tweaks, better interconnects, higher end power cords? Any and all input would be helpful. Thanks - Rob