All the movies I've streamed don't have full 5.1 sound - let alone DTS.

That's fine for a lot of movies and TV series, but pretty disappointing for movies that really need surround (or high quality sound).

I've also noticed that they're often crushing bitrate, worse than some of the low bitrate channels over satellite. Dark colors take a hit, sometimes macro blocks are visible. They're clearly trying to figure out how much compression is 'acceptable', and are probably varying the rate dynamically - but the end result is a picture that's substantially worse than DVD. That's fine for TV series (usually).

Then there's the simple fact that a lot of their catalog isn't streamed.

So, I'll keep the DVDs, thank you.

As to how many to have out at a time, well, it's hard to tell. During the warm weather, my movie watching languishes.

I'd drop from four DVDs to three, but that wouldn't save me anything as, when they raised prices last time, they "grandfathered' folks who'd been with them from the start, so I get 4 for the price of 3. IMO pretty cool, and a company I'm glad to be doing business with.