I'm a fan of the motu stuff. The 8Pre is an interesting device, but I worry about the long-term viability of FireWire. It's still what I would get for myself is I was looking to buy. It has 8 good mic preamps with phantom power for $550 or so. The Audio Express may suit you better. It has fewer inputs, only two mic preamps, but it's hybrid FireWire & USB and its $400 or so.
I've been antiTascam for some time, but they have a couple of new USB devices that look interesting and relatively cheap. I love having 8 inputs, though, so I can leave a couple of synths plugged in in addition to a couple mics, my bass, and one cord for an electric guitar of my choosing. If you ever plan on recording live drums, you'll want to considerhowmany mics you prefer for that, too, and makesure you'll have enough mic preamps for that to happen.