If you're considering that Markbass combo new, but like your GK tone... You might consider a Barefaced 212 cabs like the Super Twin (40lbs) or Big Twin (50lbs). They are around that price. Your RB + either of those 212's should be plenty loud for any gig (assuming FOH support when applicable). I use a Super Twin with a GK MB 800 and it absolutely rules. I used to use a pair of Avatar 210 neos (one for practice, two for gigs). I really liked the way they sounded and it was awesome stacking them vertically - so easy to hear yourself, but even with neo drivers they are about 45lbs each and I needed to use both for gigs. Wound up using a hand truck all the time so that's when I decided to go the super 212 route.
