I have two of each in my tank.. I have to say I like my green froggie the best.
I would put the torch in last - they have a pretty harsh sting compared to the rest of the genus, though mine has sure grown a ton compared to the others.
I voted for a torch, which is strange, considering it is the one I don't actually have right now...
I would like to get one someday, just ran out of room suddenly. I think it is a tough call though-- the honest answer is probably whatever you like best in the LFS at any time. My hammer coral is very plain looking ($10 frag) while my frogspawn is a really nice green/pink combo and looks a lot nicer.