I can't answer all your questions and it depends a lot on your available budget, but I
highly recommend the RCF ART 312-A or even the 310-A if you're not very concerned about
low end and you want something more compact. I've used a 315-A as a monitor for drums with
nice results and I even use a pair of 315-As along with a sub for FOH uses for live bands
and for small crowds (around 150 people).
Now since it is a bit pricey, if
you're on a tight budget you could even look into BEHRINGER territory. Yes BEHRINGER stuff
has a bad reputation and can have reliability issues, but they're kind of unbeatable for
the price. I've used their B215D active speakers as monitors even for drummers (as a rock
drummer myself I can tell you we need some serious SPL from our monitors :P) and though
their sound is certainly not amazing, they get the job done. As far as the reliability
goes, out of the three I own, the first one started having a problem with the amp powering
the woofer after a few months from the purchase, the second one was just not sounding
right (not sure what the problem on that one was) out of the box and the third one worked
fine. In any case, I had full warranty so either I got them repaired for free or even
replaced (the one that had trouble out of the box). I don't know if that's because of the
BEHRINGER people or because of the THOMANN people (that's where I bought them from), but
apart from some time lost I had no other problems with support.
story short, quality wise there is no comparisson between the BEHRINGER and the RCF. The
RCF is more powerful and more importantly has way much more clarity hands down. In a
monitor, I think you need both
. If you
can't afford something on that price range though, you can consider the BEHRINGER B212D or
B210D, but just be aware of what you're buying.
In my opinion, it's just that
better quality (the RCF in this case) is better on the long run.