I really enjoyed some of the riff work, especially what I'm calling the chorus (think it's Eb, Cbmaj7...well, in power chord speak, Eb6... ish xD). Sorry my ears quite rusty, I've been working a lot and as we all know, work practice isn't real practice.
Theres a couple of timing issues and the occasional note that clashes just that bit too much, but I assume that's because of the 'one shot' demo recording nature, as everything else seems rather tight.
I think your drummers going to have a lot of fun putting beats behind this, that's for sure. Are you intending for solos? I only ask because your main difficulty there may be how busy the rhythm section is. As said above, it's always good to save something back, just to have something to really blow minds later on.
All in all, I highly anticipate the complete version, and I'm sure it'll be as epic as that ******** chorus section! Seriously it's like Power Rangers meets LOTR meets Paul Gilbert...
*Hums it to self, air guitaring wildly*
EDIT: Just read the first post again. Yes, you are working on solos... well... awesome!