Your statement has me thinking a little outside the box on this one.
I can buy the series in 1080p download off iTunes for $25. That's not a bad price, though I'd like to see the extras at least once.
What are the chances of there being a Blu-ray release later? I can only think of a few series to do that, and they were phenomenally popular and didn't necessarily have Blu-ray as an option at the time the first season came out (e.g. The Sopranos).