New to tube rolling, where to purchase tubes?

I wholeheartedly second all of the above suggestions. Not meaning to trash other tube sellers on the 'Gon or on e-bay, there are tubesellers on the net that are quite disreputable, selling fakes, relabeled tubes, used to death tubes, and the like, posing them as NOS or "matched". I recommend that you have access to or own for yourself a good tube tester before buying tubes in this fashion. Tubes with shorts can damage your equipment (don't use your amp as a tube tester!). Some individuals on the net will buy good tubes from one of the reputable venders, use them for 6-12 months or so, then put them back in their orignal boxes and advertise them with the test numbers from when they bought them. In short, beware.

Tubemonger has served me well. I've used them multiple times and have no complaints.

an update -

So I ordered 2 Matsushitas from Tubemonger and received them in 1 1/2 days! Here is some feedback on the swap.

Just so you know, I am a skeptic and don't rely on my musical memory. The nice thing about the Monarchy is that I can connect the SS and Tube outputs to different inputs on the Ayre and switch on the fly. This makes it easy to do a lot of focused comparisons.

I have to say, switching tubes pretty much accomplished exactly what I wanted. The tube section always sounded too euphonic and cluttered. It lost the separation and clarity in the upper mid and high frequencies. With the Matsushita's, all the upper frequency clarity is maintained but slightly more detailed. The big improvement was in bass and mids. Bass has more impact and mids are improved and more musical. The description I use is that the sound is "rounder" now in the tube section and "flatter" in the SS section. Since I listen to a lot of guitar, violin and acoustic instrument, this really makes a difference in my listening.

This has been the best $64 bucks I have spent in a long time - and to think I was going to go audition a Berkeley Audio DAC ($5000). All the advice was terrific and useful.

Great group of people here, thanks!

Drewh1, Its always good to hear that someone has benefitted from info received here on the Gon. I truly believe that's what this site was meant to do. Unfortunately, a lot times you get infomation here that you really don't need and can't use.
When those tubes break-in they'll sound even better.

Drew,

Eee3 is right, give those tubes say 100 hours and they will be singing even better. Congrats on a excellent improvement and not a bank breaker at that.

Roger