I would recommedn doing sort of aero stuff for the spin awareness training.
If you have the time, forget the IMC and go over to the US and do the FAA IR rating - you wilo come away with 40 hours, and FAA IR rtaing and a JAA IMC to add to your UK licence - so effectively you get two licences for the price of one!
Heard it said by a few instructors - the IMC gives you just enough info to get into trouble....
Julian.