The 4400+ fell within my personal highest "range" of price for any processors. I would never spend more than $650 (CAN Dollars) for any processors, and just last week my local store had a 4400+ for $640 (taxes included).
So I had to decided just yesterday (I made a thread about it) between a 3800+, a 4200+ and a 4400+. So I got the 4400+ since there was one left in stock. Kind of an impulsive purchase, but it wasn't exceeding my budget !
I, also, wanted to wait for the M2 socket ... but after discussing some topics with the seller I finally told myself that Socket 939 will stay for a long time still, perhaps what, at least a good year and half, maybe two years.
I mean, they still have to release the X2 5000+, which if I am not mistaken will be S939 (right ?). And Socket M2 won't provide actual noticeable performance gains in gaming, according to what I've been told, and read around on the web. Personally I'd say that, right now, going with Socket 939 is far from being a mistake.
But going with 939 in say ... a year, well then that'd be another story. Time will tell.