Been reading up on Polypterus for the past few hours since someone mentioned that. I'm really leaning towards them at the moment. I especially like the looks of the Endlicheri, the fins and coloration on that one are just great looking.
There's a fish shop about 30mins from me that is owned by one of the guys in our club that carries oddball / monster type fish, I emailed him a bit ago and he said he has all sorts of Polypterus in the shop right now so I think I may head out there early next week and see some of them in person and see how I like them.