Yeah, I regret it...
Yes, I definitely regret it.
I purchased the base 27" iMac on 08/01/13 because I just needed a new machine. I play games occasionally, mostly Civ 5, and could have used the graphics upgrade of the new one. Everything else is really a marginal upgrade in my opinion.
When the new one came out I was only 20-some days beyond a return period. Not to mention I've been having some HDD issues.
Oh well, I guess it is what it is... I regret buying it but don't "blame" Apple as some people do. I don't feel cheated, just had crappy timing. I wish there was something I could do to get the new one instead.