I have a xoom and I love it, but when I sent my xoom in for the 4G upgrade, I decided to buy the 8.9 Galaxy. I must say I was pretty blown away witht he size and weight. The screens colors are much more vibrant. No it did not have an micro sd, but honestly I rarely use the one in my xoom since I have 32gb version. The xoom is not like the phones where you can install stuff from the market place on your SD card. I did install some movies on my SD card which did not perform the same as the internal memory. I was tempted to keep 8.9, but could not justify 469/569 bucks. The size alone seemed perfect for me when reading books and watching movies. It seemed like a great portable device which was extremely light. Instead, i may wait to see what the xoom 2 8.2 tablet will offer.
On another note, the Samsung had lots of custom features which imo were actually pretty cool. I was upset witht he fact that it still runs Android 3.1. Samsung never seems to upgrade stuff. I have an EVO 3d and had an EVO which is always getting updated to the latest greatest software. My friend has a Samsung Fascinate and he is still using Froyo.