They're an oddly personal choice, panniers, I reckon. It's easy to get the impression online that Ortlieb are the only choice and many people swear by them, but there are people who swear at them just as strongly.
I've only done a few fairly short tours and a bit of commuting with my Ortliebs and I like them a lot but can see why they're not for everyone. I mostly like them because they're fairly light (the roller plus ones anyway) and simple. If I was to need to buy another set (not likely anytime soon) I would seriously consider Carradice, it's cool kit and I like the fact they're made here (see also: PHD bags and down jackets).
The most regular criticisms of Ortlieb panniers are the faff of the roll-top (it doesn't take long once you get used to it) the lack of internal organisation (there's only one divider and a small mesh pocket but you can always put things in stuff sacs) the lack of external pockets (you can add them, but I don't miss them) and the dampness thing (I don't believe damp kit would dry out or not affect dry kit in any other panniers either, I just put wet stuff in a mesh bag and strap it on top of the rack, or stick it in a drybag). All that said, I don't think that the thing most people love about them, the total waterproofness, is that important, although it's easy to take for granted. Other designs are waterproof enough most of the time, and you can always use drybags (I do anyway for down kit).
Oh yes, and don't forget a bar bag with map case. So handy, especially for your camera. I use an Ortlieb one of these too with no complaints.