Well I got my momentums in last night. First off they are beautiful. Much smaller and lighter than I was anticipating. Secondly they sound great. I was worried about a lack of bass, but there is enough to satisfy me. Basically every aspect of this hp met or exceeded my expectations except the only downside to them - the comfort. I guess this is the reason you should never buy anything without trying it first. I really want these things to be comfortable, but I don't think it's going to happen. I listened for 3-4 hours last night and constantly had to adjust the phones to where they wouldn't hurt my ears.
It was just my first night with them however, I will give them plenty of more chances to work. Besides the comfort (which is very important) I couldn't be happier with these cans. Absolutely worth the $300 if they fit you.