I know I'm a bit late on the post, but I bought an E300 in late February and have been using it at gigs ever since. It has incredible tonal flexibility and some great clean sounds. The auto compression isn't really noticeable. Pretty transparent. In fact, I actually use an additional compressor in my rig as I've got a pretty soft touch.
I A/B'ed the E300 with a cheap Crate 200w head through a Peavey 115 cab and couldn't tell much of a difference, but when I got my Aguilar 210 and A/B'ed the heads it was like night and day. Those speakers came to life with the Eden. Good volume and punch for the size as well. I made a "flight case" for mine by lining a suitcase with foam mattress padding.
Cheers,
CW