I was getting more and more stoked for the Acer - until I realized there was no camera flash. I don't expect that I will be taking many pictures with the tablet, but I still think no flash on the Acer is a big miss - only marginally offset by the presence of a full USB port. It also sounds like the display on the Asus may set the bar - and the Acer may fall a little short.
When I first read about the Asus dock/keyboard, I was really excited. But I go back and forth. I have a laptop (and a netbook) and I'm not sure that the Asus dock/keyboard is the clincher (especially since that is even harder to find than the Asus tablet!). It may be just another peripheral that I will have to keep up with...Of course, I will probably get rid of the netbook once I get a tablet...In any event, the tablet needs to stand on its own for me as I would primarily use it as just that. So the availability of some type of sd slot on the tablet (regular sd as opposed to micro sd) is more important to me than a full USB port.
By the way, my netbook is an Asus which I have owned for over a year and I really enjoy using it. I want a tablet, though because, as a class, the tablets totally trump netbooks in computing power - not hard since netbooks are quite underpowered and tend to hang even when just surfing the Internet.
Anyway, I like the build quality of my Asus, so I would not hesitate to buy another Asus product.
If you have a full USB but no full SD card slot, you can use a SD card adapter.