this thread rules. haha. I just bought the Bx5's - i had the same problem.
I think what helped the most was to listen to cd's of similar music on these for a while, before I started to mix on them. this way, I'd hear what I was aiming for - and get used to the best. thus, aiming my mixes there as well.
i dont think you sohuld cut the bass off at all, anywhere. Maybe lower it a bit under 40, but don't cut it off. All those super low freaquencies are often the freaq's that can be FELT more than HEARD - so on the dance floor, don't you like to FEEL the bump? haha.
like I wrote before, I think you should not cut it off a all, for now. In fact, these cut/boost options are sometimes usefull, sometimes not. You should use these options like the room is asking for, the way the monitors are placed. You cant get to a conclusion in 1 or 2 hours, of course. I can tell you that I placed my BlueSky 2.1 setup in different ways, each 4 or 5 days, for at least 1 month!
I now work with them for about 6 months and I'm still not even shure if they are ok, I still think they are a little to close to the wall.
neway... do what you want with what I'm telling you, I'm not a renown tech that everybody in the world trust, i'm just a guy who love the music in many different ways
All i know is when i got my monitor speakers my next mix was about 100 times better than any mix i had done before, and it didnt take me 10 tries to get it right after that. The thing with the bass is everyone is used to hearing HUGE boomy bass that their seems to be a hype about. Monitor speakers arnt really hard to monitor bass on if you know how to tell when their is a balance between the highs mids and lows. When you hear the bass the same DB as the highs and mids then it should be pretty close, UNLESS your monitors are far from flat in the bass area, mids, or highs. If the highs are extended your going to bring the bass up to match it which will be too much. Its all about balance.
Recording seems to be the only thing in music that defies the triangle rule. Meaning lows are the loudest, mids are a little quieter than bass, then the highs are the lowest. Maybe there is a little bit of that but their needs to be a pretty good flat balance then let the consumer speakers do the hyped triangle.
I think that it would maybe different if consumer speakers and stuff were flat like our monitors. Maybe thats where the hype is in the consumer equipment is. They build the triangle thing in a way. But back to what i was saying, If the consumer stuff was flat we would probably mix them to the triangle. But since its more harder and more expensive to get speakers flat it doesnt work that way. That might be really confusing .
I guess I only had that problem with mixing coz my tracks have very heavy basses (Drum 'n Bass style) and I might have to get used to the monitors first.