The pomp is a bargain, I have had both a normal one and now have a disc one. I run it fixed and find that I don’t actually use the brakes that much. The chaintug thing in the link would work but makes taking wheels out a pain in the arse as the whole rear mech comes off with it with the ensuing tangling of the chain, blackhound of of here has that setup on his roadrat. I have run gears on my ti29er which has the same dropout but with added mech hanger welded on the frame and taking the wheel out is a struggle as you have to slide the wheel backwards out of the dropout against the tension of the chain/mech.
If you are going to run normal gears I’d go with the genesis, if you are going the ss/alfine route get the pomp as they do ride nicely. 42mm conti fighter2’s tyres fit in the pompetamine frame with room to spare.
09072010512 by markenduro, on Flickr
I run 32mm conti corss tyres and there is loads of room, even with full mudguards fitted.
07112010106 by markenduro, on Flickr
You’re welcome to have a go on it if you are near Burton/Derby area.
The fargos look good, if the singular gryphon had the same amount of rack mounts as the fargo there would be one in my collection.