Refurbishing the system need advise please

Two years ago I purchased a computer and some hardware to do some flight sim navigation . I never did get to use this at all
and now I need to see what to update so I can once again do some simulation, mostly for IFR navigation .

This is what I have:

Computer:
Intel Core i7 930 2.8GHz 1366 ( clocked at 4)
EVGA X58 SLI LGA1366 mobo
G.Skill F3- DDR3 1600 3x2GB ram
Windows 7 Home Premium 64bit


Graphics card ..1)XFX GTX 285
Monitor.... 1) Acer GD235HZ
Controls.....Saitek Pro yoke, rudder pedals and throttle quadrant

Nvidia 3d software and hardware
TrackIR Pro
Flight Simulator software FSX

So there it is, still works ok for one small screen 3D if I want .

Not sure I like the 3D as the glasses are too dark when trying to manage or operate anything on the keyboard or any other device.

I may just switch to three smaller 20" screens and use triplehead2go ( I think that is it) or.............I could move from the corner desk
to a dedicated larger room and go a little bigger. I do have a regular HD older projector to use for a larger screen or could go to three
larger screens or TV monitors as this seems to be an option now.

Question is what do I need in addition to what I have now to achieve this ?I will likely need a second video card or one of the newer better
options. One more option I guess is to just keep it simple and go for one
larger screen, I believe a 32" would be the biggest I could handle in the current location. I know acer had a better 27" 3D screen come out
since my last purchase, maybe even better options are available now.