The 28 days thing doesn't seem like that big of a deal to me. You wait months for a DVD to come out based on some arbitrary date anyway so as long as you don't let yourself get bothered by it being in stores it really isn't any different.
Sure ideally you could get it day of release but it seems like a tolerable compromise. I've been renting a lot lately because I have a massive DVD collection that I rarely dip into and I started to see what a money hole it was. Not to mention taking up space.