1st question. What's your budget?
a stereo 4x10 is a pointless gimmick IMO. You'd be wiser to go for either 2 2x10 or 2x12 cabs & stack em vertically & instead of having a clean & dirty, just split the signal, put one side thru your fx & then merge em back together before going into your amp. Decent cabs will handle whatever sounds you're planning on putting thru em.
If you can afford it, have a look at the neo cabs from Markbass, Genz Benz, GK, TC electronic & so on. Then take a look at some of the lightwieght amps from those guys too.