Jolida JD100 on the way

I would say stick with the standard feet. Try the Mullard CV4004 on the entry level price range of NOS, to the GE 5751's or others you can find in the archived threads. Do a search on JD-100 and I am certain you will pull up some good tube suggestions. Enjoy that player!

I, too, went with Joe's TUBE LORE suggestions and have used the following with good success:
Sylvania 5751 3-mica
RCA 5751 3-mica blackplates (late 50's vintage)
GE 5751 3-mica blackplates

Am currently using the Raytheon 5751 w/windmill getter and really like it.
If you want to stick with the 12AX7 type, try the RCA 12AX7 long blackplates.

Of course, there's the "system synergy" issue which may be complicated if you have any other tube equipment in the signal path. Finding the right combination may take some time but will be well wotrh the effort.

Good luck.

Ecool, by "no feet" I mean, no additional feet or just stock feet. Just to clarify =)

Personally, I'm not into 5751's. I like telefunken and mullard 12ax7's better. For new tubes, find some golden dragons(great value).
Anything will be better than the stock tubes in there now! I don't know why, but Jolida likes to start with the cheapest tubes???????????????

I have had very good results with the Mullard CV4004 as well which is a Military spec 12AX7.