This goes against your anti-tube bias, but I suspect that adding an inexpensive but good quality one-tube line stage, such as this one from Antique Sound Labs for $345 (new), would be a more effective fix than changing interconnects, power cords, etc. And it would provide you with the flexibility to fine-tune the sound via tube rolling.
http://www.divertech.com/asllineone.html
http://www.audioadvisor.com/prodinfo.asp?number=ASWL1
I have used this model in the past, and I found it to be essentially neutral in a system which otherwise leaned slightly in the rich, warm sounding direction.
If you decide to try it, be aware that it inverts polarity, so you would want to reverse the + and - connections to each of your speakers.
Regards,
-- Al
http://www.divertech.com/asllineone.html
http://www.audioadvisor.com/prodinfo.asp?number=ASWL1
I have used this model in the past, and I found it to be essentially neutral in a system which otherwise leaned slightly in the rich, warm sounding direction.
If you decide to try it, be aware that it inverts polarity, so you would want to reverse the + and - connections to each of your speakers.
Regards,
-- Al