I really like the QSC series. I have the K-8s and they are VERY powerful, enough to handle the size mentioned.

Things I like:

1.Great clarity (I run two in stereo, on the floor)
2. 6-year warranty
3. Very precise switches in the back for eq and volume.
4. Great power cables that 'lock' in.
5. Nice durable cabinets with a recessed back so my settings rarely change upon transport.
6. Place on the floor and I like the pads. I hadn't liked any other speakers on the floor, but this one is super with the 3-setting bass control.
7.Powered: More power than I'll ever need and I think they'd push 300 or so.

Cons: EXPENSIVE

Well, rambled enough. Just super happy with this system and had to share.

Good luck on your decision.