For what it's worth, my portable vocal chain gets pretty good results. I have recorded a good bit of hip-hop and r&b vocals with it.
KSM27--> VTB-1 --> Firewire Solo
I paid 199.99 for the Solo, and don't have too many complaints. I didn't really need the extra i/o's or preamps that are on the Firewire 410, but I did hear that the 410 uses the DMP3 preamps (I don't know that for a fact, just read it somewhere online). I'm sure someone here can verify that.
Also if you look in the clearence section of mf sometimes you can grab a good deal on a interface.