need help on transparent sounding 12au7 tubes

I second the Mullard CV4003's. I had a set of these in my Belles preamp and LOVED them. I got mine from Kevin Deal at Upscale Audio.

Valvo or Amperex 7316's...but they are pricey

Believe it or not, the Sino/Chinese are very good and transparent. Unfortunately, they just do not last a long time...... 300 hours of so. They are worth it though.
Quicksilver sells them for about 12-14.00ea. They are graded for low noise.

I would say the Telefunken are most like what you describe followed by Siemens. Andy at VTS is proabably your best source for honestly measured tubes that you can rely on - the guy knows his tubes and seems to be very honest in my experience.

Thanks for all the great recommendation, this is good information to know, will certainly use these recommendation down the line. I plan to clean the pins of the RCA's this weekend, should I use Silclear on it (silver enhancer)?

I just listened to my system tonight (well rested and everything)and it sounds amazing. This is my second night with the Eklipse and I'd have to say I'm very happy. This pre is very quiet, sweet, slightly forward in the midrange which bring out vocals perfectly for rock albums such as Dire Straits Brothers in Arms, SuperTramp, etc.