I have a 2200, and with the FEL in a pile of top soil (a little moist), I can bog the motor trying to lift with it. An 1800 is a fine machine. But why anyone would buy one with the slight price difference to upgrade to a 2200 is beyond me. I gaurantee there are scads more people who will one day wish they got the 2200 than there are people wishing they saved $500. And bear in mind that if you go to sell a 2200 and an 1800 in similar shape and hours, you will probably get more than that $500 difference out of the 2200. That would actually make the 2200 a cheaper machine to have owned.
Same idea as a $20,000 Honda being cheaper than an $18,000 Ford because at 100,000 miles, the Ford is worth $2,000 and the Honda $5,000. The Honda is $1000 cheaper to own. (That was an attempt at an example,... don't tell me how great Fords are, I'm just talking here. I could care less about cars).
Anyway, that's my take. If you can't swing the 2200 at all, buy the 1800,... it's a good machine (practically the same machine!).