Hi there,
I like a little compression on my acoustic sound too...just to even things out a bit as I fingerpick and strum (without pick) and I find it does help
I have tried quite a few comps to see what works best...
The best seems to be the Diamond CPR-1, if you really want a great comp and can afford it I'd go for that
Also I hear the Moen Uni-Comp or the newer Ulite (smaller version) are good too as they have the tilt-eq knob like the Diamond which is very helpful for acoustics...I have not tried the Moen yet but I plan on getting one soon as they are not so expensive
I also have an 80's vestax comp which I got very cheap and it works well, it also has treble and mid controls...maybe you can find one on ebay