In flightsims, I consider TrackIR to be a must now.
I'll keep you updated, but while I already have three new game boxes, I still need to wait for the hardware. The shop where I bought is waiting for a delivery of revisioned boards for the type I ordered, hopefully by the end of this week. Not before then they can assemble it for me.
I am also considering A-10, but not now (3 new titles at once already is a load), and I want it to have received one or two of the inevitable patches first before I depart with my money. It's already an expensive week right now, and additional costs for wheel and 2nd HD maybe already lurk beyond the horizon.
I look forward to do a real huge air battle for the first time in BoBII-Wings of Victory, and to boost the frames in FS9+mods, with most things maxed out. The racing sims I already have, already play fluidly right now, so probably no big difference there with improved hardware. I hope I do not get haunted by compatability issues with some of my beloved classics.