Cstraub, Hit the nail on the head (as usual). The AFR's get so much good press/hype, while they are great heads, they compare their numbers for ported heads to other heads that are not ported. I personally have a set of 215cc Dart Pro 1's and they have served me well. On a N/A 385ci I made about 500hp with them on pump gas (bowl blended, port matched, they really don't need a lot of work). They are now on my blown 388ci and I couldn't be happier.
I know of ported Trick Flows that out flow/perform AFR's for even less money. If you want a head you can buy and bolt on, then the AFR's are not a bad choice.
How much power are you trying to make? What size engine? You may already have more head than you need. If you do decide to off the Dart's let me know, I might be interested.