My only disappointment is the amount of Âsweetness in the midrange, would like some more of that. Three questions for my Supratek bretheren;
1) Any NOS tubes thatÂd exchange some bass response for more midrange sweetness?
2) what would be an appropriate level of turntable for this phonostage, I was thinking MMF7 or something in that strata  can I go for a less table like the MMF5 or would going up the food chain be the hot ticket?
3) the power supply tube is only an inch from the next shelf and the bottome of the shelf feels very warm to the touch. The rack is open on all sides. Cause for concern ?
1.) Sylvania VT231 have a sweet midrange and less bass punch as well as RCA VT231 in my system. The EH 6SN7 though sounds wonderful as well and does not command the outrageous NOS tube prices.
2.) I would recommend a Teres table. Also, a Denon 103R while you are at it with a high mass arm.
3.) Although it will take an enormous amount of heat from the tubes to burn your shelf even at an inch away which is impossible to achieve with the 5AR4/5Y3 type tube, peace of mind is the thing that really matters here in the long run.
cheers