Quote: I am planning to wait as long as I can
That might be a while. The shutter is supposed to last you 100k shots or something huge. I bought mine this year with only 4k on it.
Quote: Yeah, the DS feels good.
Yeah!
Quote: Do you really need an SLR for a backup?
I suppose if subidoc eventually gets a K-7 (or the K-1!), then the DS naturally becomes the backup body, unless he goes to the trouble of selling it. It's worth about US$200, which is roughly the price of an average PnS anyway.
Quote: It's just that P&S cameras can take good photos, and are probably adequate for 95% of your photo needs.
That depends. For me, the PnS was (still is) great for carrying around, and for learning to frame a picture. I had a Canon Powershot with manual modes. However, upgrading to the DS meant doing away with shutter lags, having interchangeable lenses and a much bigger sensor. An example: a PnS just can't blur out the background and shoot in low light like a 50mm f1.4 can. The DS is slow by today's standards, but it's still heaps snappier than even your modern average PnS.
You might have gathered this by now - I really like the DS!
I think it's amazing how it's still so useable given it was released in 2004. I often have people mistaking it as a PnS because of its small size, or a 40D user looking on with envy. Not everyone likes the loud shutter, but it impresses some people who think it sounds "more professional"!