Glejs,
I'm far from an expert on these matters. I admit I have a tendency of dissing Behringer gear per se, and it's important to remember I haven't tried these speakers myself. But from what I understand (based on reviews), the Truths are great value. They are not great speakers, but they are great value for the money. Look up Rip Rowan's shootout at prorec.com (they Reveals aren't there unfortunately).
I know two people who use the Reveals, Meshuggah and a guy at my school. They both seem to like them very much, except they're a bit bass shy. I also understand these monitors are great value for money. They are more expensive than the Truths, but also better. I know Tannoy have a sub bass monitor to go with the Reveals, and I'm not sure how much that costs. Could be a lot.
At my school (Stockholm Music Conservatory) one of the studios have the Mackies. Now these are REAL monitors. This is a set of monitors you definitely could use professionally. When I play my mixes through them, I hear excactly what mistakes I made when mixing. Always makes me cringe. Anyway, there is more than enough butt in those for mixing dance music or whatever. Some people seem to think they're TOO bassy though, so their mixes end up low on bass.
There are also two pairs of the active Yamaha monitors at my school, both the small ones and the big ones. I can't remember their model names, and I don't care because they both blow dead goats. The treble will pierce your head in a minute and make your mixes sound like there is a blanket over it. Horrible. Stay away from those.
I am currently using
the Alesis Monitor one, the old passive version. It is not a fantastic monitor, but I've used them for seven or eight years now so I know pretty much what they're telling me. This is an point to remember: As long as your speakers are decent (which excludes the Yamahas), you will learn what they tell you. When you find all your mixes are a bit trebly when listening to other systems, you will know your monitors aren't giving you all the treble there is in the material. So you compensate, and keep the treble down. No speaker is ruler flat, and no mixing room is either. They all have to be learned. Expensive ones have to be learned less. So before you start doubling your budget, I think you should follow the advice given before, and make some mixes at your friends' places, and see what the result is. If you're happy with what you're achieving on the Behringers, there is no reason in the world not to get those.
Before long I will get better monitors, and then I'm leaning towards the Mackies. But they are painstakingly expensive over here, I think list price is something like $1900/pair. You could order them from Germany which would make it a little less expensive.
Hope this helps. Hey, why don't you record a song, and then mix it at both your friends places, and post the two versions in the Mixing clinic? That would be pretty interesting.
Cheers
/Henrik
Henrik just stormed this place and started talking 'bout some sub bass speaker..? That's neat solution.. I could get the Tannoy Reveal's now and later on buy that sub. .. . . . . Or wait, I could save my cash another 6 months and get those HR824 monitors everyone's talking about! But then again, I'm just a simple hobby musician.. do I need the best monitors out there..? me think not. The battle is between Reveal and Truth.. let the truth be revealed some day! 
I have a great sense of humour yah. hehe. I'm tired. Thanks for all your help and confusion and everything 
