Khev, you don't want to see it on a dome. Trust me, it's awful. I saw the 6 min prologue on the Dome IMAX (Omnimax) in Pittsburgh. It's real IMAX but it's quite jarring. I don't think you'd be too comfortable seeing it.
I saw real IMAX for my very first showing (not the dome). I thought it was great. I didn't really notice the problems people had with the aspect ratio changing from non-IMAX to IMAX but that's because it was my first viewing and I was so immersed in it that I didn't notice. On another viewing I did though and it is quite noticeable.
As for the sound quality, I actually went to a normal theater like my third time and it seemed better than the IMAX.
Back in 2008 when I saw TDK in IMAX the sound quality towards the end was pretty bad. The problem I had was that the score was blaring over most of the dialogue. Like Gordon's speech at the end "a silent guardian . . ." The Zimmer soundtrack completely destroyed what Gordon was saying.
Here's a list of IMAX theaters, obviously avoid the dome.
Florida,
Autonation IMAX, Museum of Discovery & Science (15/70)
IMAX Dome, Museum of Science & Industry (15/70)
There are more but they're the "fake" IMAX,
Florida
AMC Altamonte Mall 24 & IMAX (D)
AMC Aventura 24 & IMAX (D)
AMC Regency 24 & IMAX (D)
AMC Orange Park 24 & IMAX (D)
AMC Sarasota 12 & IMAX (D)
AMC Sunset Place 24 & IMAX (D)
AMC Tallahassee Mall 20 & IMAX (D)
AMC The Regency 20 & IMAX (D)
AMC Universal Cineplex 20 & IMAX (D)
AMC Veterans 24 & IMAX (D)
AMC Woodlands Square 20 & IMAX (D)
Cobb Dolphin Mall 19 & IMAX (D)
Cobb Lakeside 18 & IMAX (D)
Cobb Merritt Square 16 & IMAX (D)
Grand Pier Park & IMAX (D)
Muvico Baywalk 20 & IMAX (D)
Muvico Parisian 20 & IMAX (D)
Rave Bayou 15 & IMAX (D)
Rave Destin Commons 14 & IMAX (D)
Regal Gulf Coast Town Center Stadium 16 & IMAX (D)
Regal Sawgrass 23 & IMAX (D)
Regal Waterford Lakes Stadium 20 & IMAX (D)
World Golf Hall of Fame IMAX Theatre (D)
Here are the comparisons,