Hi.
If looking to buy new:
We use these as monitors / smallest PA (acoustic)
http://www.thomann.de/gb/the_box_ma120_mk_ii.htm
A pair of these in PA in "not that loud" gigs:
http://www.thomann.de/gb/the_box_pa5...angesystem.htm
In these:
http://www.thomann.de/gb/millenium_b...taenderset.htm
Both cabs double as monitors when used with our kW range PA, and as rehearsal PA.
Get's the work done, for us (rock covers) at least.
When looking at these cheapos just think Chinese/Behringer and remember the mantra: "You get what You pay for".
For me the 3year warranty is good enough.
If looking to buy used:
Your local (where ever that might be) area should have quite lot of separates in the power range You're lookin for, for sale as people are IME leaning towards active systems for portability and ease of use. When going for separates, there HAS TO be at least one person responsible for taking care of the cables and such as the used and/or cheap stuff is IME rather fragile if not in rack cases and permanently wired.
Just my 0.02€
Sam