For a while I'm looking for bass cabs, that can be used for monitor. It's rare, that there is no P.A., so that you have to use your amp as the main amplification for bass, and most of the time I lift my cabs to ear level anyway, as I don't have ears on my legs. So the best sollution would be a bass cab, which can sit in wedge position. I've found Markbass made some wedge cabs, the Standard 121HR, and the two new Marcus Miller cabs have that option too. Have you tried any of them, or use some good wedge cabs? It's a common problem, that the bass cab sounds good, if it's not pointing at you, but if you aim it on yoursef, you hear a not so pleasant sound, the direct midrange, and string clank hits you. So that can be a problem as well when you use bass cab as a monitor. Any experience and solution?