Some Epi valve junior/special questions....

[goodbyebluesky]

I know there must be a lot of Valve Junior owners here. I'm curious about a few things:
Whats an affordable source to replace the stock tubes? Theres a million websites out there, and I've never owned a tube amp before so I don't what company makes which tube the best for the money. Are Groove Tubes a good brand to pop in there for the El84 and 12AX7? From what I've read the sovtek's it comes with aren't great.

ZZounds has electro-harmonix el84 for 11.95, anybody used this is their valve junior? 'Cus the Groove Tubes el84s seem pricey.
They have the 12ax7 from groove tubes for 14.95, that doesnt seem bad.