B_G,
As you're really only "simulating" the procedures and not the flying, FS98 (or higher) is a good bet.
Helps with the morse if you don't just practice the same ones all the time
Also helps visualise what the OBS/RBI look like - "fly" some of the more advanced models and you get an RMI instead, which is handy if that's what your training aircraft has...
Also good to just sit in the cockpit of the real aircraft and visualise what would be happening - and it's free
Pen and paper work, too
PS, check your PMs.