If you choose the "bigger" aproach proposed by Dave, I can add a sugestion. An excellent monitor that works very well either as a monitor or (for me) as the only sound source - in smaller venues - is ART200A from the italian RCF. RCF was bought by Mackie (one or two years ago, I don't remember well), that is selling now exactly the same product under the very same reference in the "Mackie Industrial" line.

It's a bi-amplified speaker (LF: 140W, HF:40W), weighting 17 Kg. I had the chance to compare JBL EON and RCF/Mackie ART200A. While they are both equivalent in power, the EON as a much more linear frequency response (better for classic or acoustic music), than the ART200A, with clearly boosted low and high frequencies (better for electronic music applications).

More information: http://www.mackieindustrial.com/Products/Art_Series/ART200A/ART200A.html

Good shopping!