Hey Jcacq, welcome to the Aune family
The cheaper tubes aren't exactly wildcards... I would say they just represent the sound differently, and some people prefer a more neutral/transparent presentation. To be honest, you may still enjoy the cheaper tubes, as I've personally found some of the higher priced tubes offer just a touch more (clearer/detailed highs, or tighter bass with more impact).
I don't think you'd go wrong trying the cheaper tubes out, and also you can find some really great deals on ebay if you have the patience.
examples of used tubes:
http://www.ebay.com/itm/Amperex-6922-E88CC-6DJ8-tubes-/301133026782
http://www.ebay.ca/itm/371020153374
and some other still available listings:
ecc88's (nice highs) around $45 each...
http://www.ebay.com/itm/370952388887
http://www.ebay.com/itm/360860036284
http://www.ebay.com/itm/231167736803
e188cc
http://www.ebay.com/itm/111301724762
voshkod rocket nos, cheap $22
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=201064852058
philips jan 6922 used, $50 for a pair
http://www.ebay.ca/itm/One-Matched-Pair-of-JAN-6922-Tubes-By-Philips-of-USA-/370969328514
amperex bb 6dj8 nos, cheap
http://www.ebay.com/itm/Amperex-6DJ8-tube-/131155674736
and here you go... two OG's testing strong for $40
http://www.ebay.com/itm/2-Amperex-Heerlen-6DJ8-Vacuum-Tubes-Tested-GAE-Series-Same-Codes-Dimpled-Disc-/151266354513
(I'm sure these will all be snatched up very quickly