I'd get a brand new one for $20 /w SATA connectivity. cdrws/dvdrws seem to break, atleast old ones and LG's have for me.
Don't have time at the moment but before going with a fusion based system using the F1 socket I'd have a look for AMD roadmap to see what their plans are with this socket. As far as I know the new Bulldozer FX processors are meant to work on AM3+ motherboards, or did they change their minds about this? So if we stick with a Phenom build with a graphics card at the moment but get an AM3+ motherboard instead we have the possibility of future upgradability.
This is a very good point. I took the assumption that the Bulldozer FX series (AMD CPUs) which are soon to be released would also be Socket FM1, like the Fusion cpus. If they are keeping it in an AM3+ socket I'd stay with an AM3+ socket mobo all day everyday. It'll just let you do more in the future. You still will have to upgrade your memory to faster spec memory if you throw a faster CPU in the motherboard, but your only spending $40 on memory, not a $100.
My opinion from reading reviews is a Core i5 will run laps around a Phenom all day, however I know people who have them and they are fast, satisfying chips, the Phenom's.
I know the Fusion/Llano I posted for you is a bit slower than a AMD Athlon II X4 /w the videocard you picked out.
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103871
So a Phenom with your card would be a chunk better than the Fusion/Llano, because Athlon's arent as fast as Phenoms. I think they're missing some L2/L3 cache.
Only thing is the Fusion would be cheaper, probably would get you by happily in WoW, and you could throw a videocard in there later without tossing out the $75 one your contemplating to buy now.
So in reverse of Arris's list, we have
Cheapest Build: AMD Fusion LLano CPU w/o a videocard because one is built into the CPU
Medium Build: Phenom X4 / 6670 videocard
High-End Build: Core i5 2500k with aftermarket air cooler and a videocard of your choice. This would also take atleast a 650w powersupply if you were to put a semi-powerful card in conjunction with Overclocking (OCing) the chip. OC'd I think they can drink 180watts - 220watts of power.