Yeah, I had read the dimensions and everything, but I didn't realize the gargantuan scale of the Mac Pro until I had it set-up. It screams, and it functions perfectly. Haven't got around to installing Windows yet, will post when I have.
The speakers are JBL Creature II speakers. Its a very nice 2.1 setup that provides excellent sound for music, movies, and games. Pumping bass, good treble, and full-figured midrange. I watched Star Wars on this rig and it sounded very nice, played some Zeppelin on them, and it all sounds excellent. They're also very compact, excellent for limited desk space. They're a fantastic deal at amazon, about $70.