I was really hoping they'd release an updated *something* today, which would give me the go/no-go on a purchase. I guess I'll wait a little longer to figure out what's up. Though if I were you I'd just buy the 8GB RAM, BTW. It's much, much cheaper to jump to 16 or 32 after market.
Thanks for the heads-up re: RAM! I've thought about that... Would you recommend the Crucial brand of RAM for the 5k iMac? Looks easy enough to install. Hmm. And the price of 32GB apple RAM is just ridiculous.
Oh, and I am anxiously waiting to see what they do as well. I look at it this way: If I order the existing 5k today I won't have it for another week. And I have 14 days from the day I receive it to return for no reason. So that puts me deep into October. If they were going to announce something, I would think/hope it would happen by then.