i own the ebs multicomp. very good. does what it says and don't mess with your original tone, unless you hit the tubesim switch which will add "tube" like tone for fingerstyle.
when doing homework i narrowed it down to BBE OptoStomp, Demeter Compulator, Carl Martin Compressor and EBS Multicomp.
At that time when I was looking, Demeter wasn't available in Singapore yet - now ebenex has it I think.
Carl Martin also wasn't avail in SG - now Davis has it.
I found the BBE Optostomp at a local shop, but I was so put off by their attitude and rip-off pricing (2 times the price of what i expected!! and i did my homework on prices, so I know how much it should cost), they refused to lower the price so i refused to buy from there (hint: a shop in bras basar).
So in the end, I bought the EBS from Davis - no attitude, and fair price.