Yep, that's it. You could really make do with anything really. The Arkel grocery bag pannier is just really useful. I've got the older model with only one clip (of which one of the teeth broke off). It's in great shape though considering I've broken a frame that had the bag on it and laid the bike down many, many, many times.

I think the nicest thing about the grocery bag pannier is that it ballons taller than the bag for when you have a whole lot. It's a good half foot taller than my rack when it's completely full. The only downside is that all Arkel stuff is expensive compared to other bike stuff. But I justify it by seeing that filling up my car costs 30 bucks or something like that and I haven't done that since before katrina hit. So, two or three tanks of gas and it has paid for itself (which it already has).

I also have a full set of touring panniers in my closet. I guess I'm just a gear nut. I save up to buy gear so that I can have experiences instead of buying stuff that is the experience.

[edit] I just realized the new bag has a lot of nice new features compared to mine. The grocery bag pannier I have is just a big bag with a wallet pocket inside. I like the new design a lot with all the extra pockets and it still costs the same. [edit]