i had an ea on my ***** am and had the same problem with the low idle voltage. it was pretty bad, sitting at 600 rpm it would only put out about 11v. would hit 14ish by 8 or 900 rpm though, i ended up just changing my idle rpm so it always idled that high, which was obviously not the way i wanted to go about things.
went with an iraggi for my 98 explorer, and it's awesome. drops to about 13.6 at idle (600 rpm) soon as you give it any gas its 14.4. i get no dimming at all with 3000 watts rms going full tilt while driving, and just the slightest bit at idle, it never drops under 13v even at idle. plus dom's customer service (in my case anyway, can't speak for everyone) has been phenominal. great guy.