Well unless you really really need all that options, and since there will probably be some new models coming this summer, not to mention the tablet frenzy we are bound to see in the coming months, I would suggest that you get yourself something cheap and portable AND a Smartphone.
Seriously, Sony’s PRS-350 has great reviews, a pearl screen, the best touch screen on the eReader market and you can get it quite cheap online (pixmania, etc.). It’s an awesome reader, very portable and quite inexpensive. Apart from the portability, a 5’’ screen will give you a crisper image, since they’re exactly the same resolution as the 6’’ ones.
We’ll probably see some sweet tablets soon, and they would be a whole lot better for web browsing. All of the eBook readers I’ve seen really suck at browsing.
Well, that’s my 0.02€…
As for your shortlist, go for the cheapest one (the Beebook, I think). Something better is bound to be on the market soon anyway.