I have DCS-A10c and it is a great sim. Very expensive though. It has cost me $39AUD for the sim, $580 for the Warthog, $90 for the MFD's, few bux for a second monitor plus the usual hardware upgrades.
The learning curve for procedures is steep if you go for full realism.
I haven't played it for a while because of COD so when I decide to get back into it I'll have to relearn all the weapon systems etc.
With the hotas set up it is a very tactile game. I would hate to try to play it using the keyboard short cuts.
Hmmm! that reminds me must check to see if anyones released a UFC!