If you're bypassing the pre-amps and you're not using Protools, I'd keep the firepod. Maybe pick up a little Mackie 1202 mixer for a little more control over monitor mix, but the firepod should have sufficient outs. I might be wrong!
Depending how many monitor outputs you need, you might be able to get away with a firebox, or any of the other afformentioned interfaces. 1 or 2 inputs is fairly easy to get for relatively cheap!