i havent played a classic 30 in a while but those 30w crates are pretty sweet. my suggestion is to make them throw in a full set of groove tubes, three GT12AX7C preamps and four GTEL84S power tubes, then get a free celestion G12H-30w 8 ohm speaker, they will probably need to order it for you. throw those tubes and speaker in and you are in tone heaven.
you definitly want the el84s models, they are the jj variety
i like the 12ax7c tubes for a sweet bluesy/classic rock tone. if you like more edge then ask for the 12ax7m tubes
do you have your guy at gc? if not get to know which guy is the good guy and knows his stuff.
if so, or when you find out whos the good guy to know, tell your sales dude you want the amp, tubes and speaker for $650 including tax. if he says he cant do it, tell him youll walk. if he still says no, walk. if hes not a moron, hell do the deal.
always buy from the same guy and getting deals isnt so hard.