A really good question!
See there isnt much difference in terms of look between CM10 and jelly bean styled cm7 Roms.
There are a few good things about actual jelly bean like expanded/expandable notifications,better support for proxy connections etc.(We can get those kind of notifications in CMX as well
Since,we dont have a gpu on our device,special features of ICS/JB like full hardware acceleration,butter project are pretty much useless for us.
Android has evolved to a great extent and has become much richer from times.Compare the looks of stock cm7 and now cm10,there's a huge difference.But its a good idea to have those rich looks with old speed and stability,without sacrificing a lot.
So if you ask me,I'll say cm7 roms will always win in the context of wildfire.You aren't sacrificing much being on gingerbread.