Doesn't sound quite right. it's got a celestian vintage 30 which i've seen a few people on the net complain about. Tis a bit harsh on the top end and thin on the bass.
Played it through someones 2x12 cab(not sure what speakers though) and there was a noticeable difference in clarity.
totally unsure what to replace it with though! I'll be playing a fender strat usa through it so if you have any recommendations fire them at me!
Hard to say without knowing what kind of sound you're looking for, blues-metal-country-etc. I'd suggest taking a look over at the Weber website, they have pretty much any flavor and style of speaker you could want there, and they do an excellent job with descriptions and explanations of how the various models sound and react. Well worth reading through their website for knowledges' sake alone.
Good luck and Cheers!
Strat