You want some pa monitors

Cheap, reasonable sound with punch and bass
and that don`t mind being carted around

http://www.studiospares.com/pd_27623...RS%20PAIR.htm#

http://www.dv247.com/invt/25888/

http://www.millennium-music.co.uk/ho...id=PA+SPEAKERS

you`ll find loads here

http://www.millennium-music.co.uk/ho...&page=1&ppp=20