If you don't need strong and deep bass and some upper bass is sufficient, I highly recommend these (once again), really powerful, very light and compact, 2 x 90W RMS continuous:

http://www.thomann.de/gb/fbt_j5a_j_serie.htm

or, just slightly heavier, 2 x 120W RMS:

http://www.thomann.de/gb/db_technologies_k_300.htm.