In my experience, the cab dimensions should be matched with the guitar you are using as well as the sound you like. I was ABing the traditional and standard cabs at the local music store while running my Dual Rectifier and I discovered that the Traditional cab sounds great with the Vintage setting for a nice open crunch. If you want a lighter rock / punk rock distortion it is great. (I call that a 'happy crunch', haha) When I switched to the modern channel, I found the Traditional cab to be too 'small' for the tone the amp was generating. By comparison, the Standard Rectocab was 'filled' by the modern hi gain tone from the head. Basically, if you like modern rock, metal, "Nu Metal", Hardcore, or any of those more extreme styles, the Bigger cab does that sound well. With my Les Paul, I have to roll off the bass quite a bit because the guitar has a pretty fat bottom end already and I don't like to compete with the bassist. I think my only complaint with the V30s is that they need a heck of a lot of power running through them for the speakers to respond appropriately. The high end can be a bit harsh and they tend to sound constipated at low volumes. Basically, I'd never think of gigging my halfstack without wearing hearing protection. I think if I ever have money to do a mod, I'd swap out two of the v30s for G12H 30s in an X configuration. This will 'loosen' up the sound a bit.
Since I only play my Les Paul, I haven't ever bothered to try other guitars with my gear but I do know that the guitar really influences your amp and speaker combo a lot. Some amps sound great with one guitar and mediocre if not terrible with another. I'd say that as a general rule, the Rectifier series amps have a very thick sound and work best with a very clear sounding guitar. e.g. Les Pauls with Alnico V magnets, Strats, Teles, PRS.