LOL
I think an AR would be cheaper to run (assuming you got it in 5.56 or .223.) My judgment isn't clouded by personal attachment to the heavy recoil or the beautiful wooden stock.
I think the obvious answer is get both, eventually. Personally, I'll go for the AR now, then later, when I have enough money to get a really nice M1a.
That is just my own opinion. : )
Only bad thing is the M1A's keep going up in price where the AR's are kinda hit and miss lately on the prices.