Space Designer vs. TC M-One

[Addni]

Hey there. I'm a Logic Pro 8 user, and will be recieving my Fireface 400 any day know.

I'm starting an Iron Maiden-ish project (3 songs) as soon as I get my interface.

My studio space is at a place where there's also a live concert hall, and they have the TC Electronics M-One Reverb and D-Two delay.

I was thinking, should I be bothering with moving those two down to my studio during mixdown (and maybe tracking) to use them as outboard effects (just sending trough them one channel at a time and recording just the effect 100% wet on a seperate audio channel.

The TC would be an extra DA/AD, but I think the fireface converters are pretty decent so it wouldn't be hurting my audio to much. But is there anything the M-One has that Space Designer doesn't ?