I threw together a quick mix of "Kick Start" last night. I guess it doesn't really sound that much different from the mix you entered into Nur Ein, but I do think the vocals sound marginally more to my liking. The vocal tracks sounded odd to me for some reason. Adam figured out that there isn't really any bass in them. I'm not sure if it's your mic, or what. You've also got a fair amount of room ambience, though nothing too troubling. Still, Ken's advice may be really good for you. If you get closer up to the mic you'll get more bass frequencies and less room ambience. Of course, if the bass were there, I'd have cut it anyway, but it's nice to have a full range recording to start with, so you can choose to cut the bass or not. If you're up on the mic more, you might want to watch out about all the loud breathing stuff you're doing, and watch your plosives. You'll definitely want a wind/pop screen. Anyway, I'm not sure, but it kind of sounded like you panned one or both of your vocal tracks away from the center a bit. I tried keeping them both in the center. A lot of the time your second track is doubling and not harmonizing, and I'm just more used to having doubled primary vocal tracks be centered together. I also turned down the second vocal track a bit. Adam said the vocals could use a boost around 5k, so I tried that and it of course did make them sound better. I also cut some mids from the guitars, in a completely novice and unscientific way, which to my untrained ears seemed to help give the vocals a little more room. I ran the two vox tracks into a group track, so other than cutting the second track, they were processed together wth the same EQ and compression and reverb. I used a smaller reverb and less of it than I think I heard in your mix. For compression I used a "Rock Lead Vocals" preset, and didn't futz with it much. I'm not that great with a compressor yet, so I can provide the settings if you want, but I don't know how useful they'll really be. Anyway, this isn't a great mix or anything, but I think the vocals sound a little better to me personally. I don't think they're so radically different though that everyone will necessarily agree about that.
http://personalgrid.com/12998-reist_kickstart?download
On a side note, I also wound up not using your two tom tracks or the room ambience drum track. I thought your two overhead tracks sounded better raw than a lot of SF! drums do mixed, so I used those and the kick and snare tracks. You could possibly save yourself some time mixing your drums by just going with those four tracks (rather than all seven) and use the time you save to work on mixing your vocals, if you're in a hurry. Of course, I'm not a drummer, and I have little to no experience mixing drums, so this is not expert advice or anything close to it.
Anyway, thanks for uploading the tracks. It's very fun to have them to play around with, particularly the drum tracks for me since I rarely have real drum tracks to try to mix. Hopefully Adam will get a chance to make mix, as I'm eager to hear what he can do with these tracks.