At online vendors, I haven't seen them higher than $1800...is the $2200 you're referencing Canadian or AU $s? My boss picked one up yesterday for $1600.
at a more "normal" 1k vs $1600....i think the added benefits on the TSO pay for themselves. Better frame, checkering, grips, sights, thumb rest, magwell, hammer...all that i think would add up to the difference. Plus, the TSO is just a sexy beast out of the box. You certainly don't "need" to do anything to the trigger.
My only complaint with the TS/TSO is the safety. I put the shadow2 safety on mine after having problems with both the stock safety and the extended version from CZC.