Based on all the answers here I'm currently still partly undecided
Hmm gotta be patient. I've now been looking at the up-coming Windows 8 tablets. Of particular interest is the Asus Transformer Book. Too bad it won't be released anytime soon
I think it is a safe bet when it comes to reading CHMs and PDFs
Anyway waiting is boring so I went ahead and ordered the ASUS TF700KL. Too bad it too will take some time to arrive (mid August in Finland). The TF700 is handy as it has 3g/4g built in so I'll be using it more on the road. Based on the stats it should be a very nice experience to use it for reading.