I also waited a long time in deciding my first reader. In the end i just took the plunge and got a sony reader since i can't be bothered with waiting for the perfect reader any longer.
If you're concerned with how your .lit ebooks will look like after conversion, you can always post an example and ask how it'll look like on various readers. I'm sure mobileread users can help you on that.
For cool-er reader, i'd worry about firmware and support. I got the sony even though singapore started selling other readers because its a popular reader. You can always ask for help from sony or post a help thread here. Many people have also made hacks and posted various ways to improve usage of the product or deal with bugs,
Actually, if you like cool-er, you should go for it. There's local warranty if anything goes wrong. Or you can wait for the onyx boox aka keyreader that was on the news lately. It has gotten some really good reviews around here. The problem is of course you have to wait. The agony of waiting isn't for some people.
