In looking at CNET and YouTube reviews, your comments do not stand up.
"Runs Faster" - both seem to be similar.
"Better quality screen" - It is wider. That changes the feel of the Asus Transformer. Many people prefer the dimensions of the iPad because it is easier to hold. Yet the wide screen is nice to watch.
"Optional keyboard is brilliant" - It is nicely done. The iPad has an optional keyboard, too.
"USB ports and SD Card Slots" - I like having them built in, too. The iPad it is an optional cable.
"HDMI output" - Also available on the iPad
"Better OS" - sorry, but you lose credibility here. The Apple OS is far more polished and does not crash. However, it is locked. I would prefer to have an open OS like the Android. That comes with a cost which is stability and ease of use. Honeycomb seems to be catching up and 3.1 is an improvement, but it is still not there, yet. Give them 6 months or a year.
Buying today, it is the iPad2 because of the Apps and the stability of the OS. But the Transformer sure is a nice alternative.