I've had the Asus Transformer since it was released and got the keyboard as well once it was available. I never really liked the way the Transformer looked with the bezel, and really found the extra keyboard kind of pointless. Anyways, yesterday I went to my local Staples and checked out the Iconia A500 and here are my thoughts, the build quality on the Acer is actually better than the Asus, I didn't care which one weighted more but screen quality was very important to me, luckily, the store had a Transformer on display as well and after some comparing I found the screens to really be on par and viewing angles/colours are just as good to the naked eye on the Acer as it is on the Asus. Overall though I thought the Acer Iconia A500 is a better choice than the Transformer if like me, you don't care for the keyboard. Aesthetically I like the way the Acer looks better and also feel that the build quality is a bit better with the Acer. So I ordered one from Staples and will be selling my Asus Transformer + Dock.
I'm just worried at the frequency of updates from Acer as I've owned other Acer products before and they are not the best when it comes to Support, as well it seems that development for the Transformer is moving a long faster than for the Iconia.