Sweet deal on the V4 cab, are the speakers good to go in that thing?
An Emperor is DEF worth every penny, amazing cabs. They utilize a unique internal design and they resonate like no other cab I've owned as a result, sound is absolutely HUGE! Speaker choices are immense but the stock Weber 65 12s are KILLER, smooth highs, nice mids, lots of tight controlled bass, probably the best speakers I've ever owned in terms of versatility. I don't think you'd be let down and I honestly don't know of a better cab value on the market, most bang for the buck, easily.
You can get a custom 4x12 with your choice of speakers, stain, grill, etc for around $800, cheaper than a lot of mass produced cabs that don't compare imo. I replaced some Orange and Marshall cabs years ago with Emperors and I ain't ever going back, totally in love and I have a wide array. 4x12, 2x12, Oversize 2x12, vert 2x12, 1x12s, they all rule. Look beefy as fuck but they really don't weigh much at all until you go getting 6x12s or 3x15s. Mine are far lighter than my old Orange stuff. Plan to get a 1x15, pair with one of those 2x12s, then all done.

Mammoth and Olde Crow make some cool shit too.
And there's always Avatar if you wanna save some bucks. People around these parts seem to like those cabs quite a bit. Regardless, some of 'em are pricey enough that I would just save up a little longer and get exactly what I was after.