Tube recomendations for a newbie

I have found after trying many different brands of modern production EL34 tubes that the SED Winged "C"s provided, what I perceived to be, a significant improvement in my Shanling SP80 amps. Tube rolling with used or NOS tubes can be a hugh gamble as Elizabeth pointed out. If you decide to pursue tube rolling for the small tubes find a tube seller who has a long term reputation. Purchases from some individuals can be costly and many times not very rewarding.

I believe tube rolling can make a big difference in the sound of the component. Whether or not rolling the originals out of the Migda will be better or not, only you can decide.
I've had great luck with sellers here on A-Gon, as well as Jim McShane (google, you'll find him). Jim will help you get the right tubes for your amp and your preferences.
Personally, I would recommend you begin with the 12AU and 12AX tubes. Cheaper, and my experience has been that they affect the sound more (certainly as much) as the output tubes.
Have fun!

http://www.audioasylum.com/scripts/d.pl?audio/faq/joes-tubes.html This site has a lot of information and Joe reviews a lot of different NOS tubes. As Elizabeth said it can be fun and really frustrating chasing the best tubes. You may want to get used to the amp first and do some reading. It might also be good for the amp to burn in and make sure everything is settled. Maybe a few hundred hours? Then take a chance and see what you get

Thanks for all your good information. I will take a wait and listen longer approach before I start to mix and match.