I chose the Sony PRS-600. It's a little pricey, but I prefer the 6" screen and it seems to support the most formats. The touch screen is cool, but I can't say I've taken advantage of the functionality except for clicking on words for the dictionary. I bought this to read books, not surf the net so I didn't really care about the wireless capabilities. I've already checked books out of my local library as well as found books to download. I won a Kindle DX last week and decided to stick with the Sony.

That's my 2 cents.

All things being equal(at least on paper) I would recommend looking at the providers backbone to the Internet. Go for a 1st tier or facilities based co-lo provider if you can. Check on the security of the different facilities.(they're rarely exactly the same) Also check to see if you have escorted or unescorted access to your servers. Make sure you can gain access 24x7, and it's preferable if you do not have to make an appointment. And you may want to check and see how many other users will be sharing the same switch as you, and how that is connected to the co-lo facility's backbone to the Internet. All I can think of right now. Sliverr