I currently have the Samsung Galaxy Tab 8.9. That decision was made after buying and returning the GTab 7" (original), an iPad and the original Kindle Fire. All except the iPad were returned because I wanted something bigger and the iPad was returned because I couldn't go to iOS after using Android (phone/tablet). Plus it was just too heavy and large to take with me everywhere. My daily devices are my phone, Kindle and my tablet.
I found the 8.9 size to be perfect for me and I really love the Google ecosystem and have heavily invested in it. I am also heavily invested in the Amazon ecosystem--having been a Kindle user since 2008 and I've been an Amazon Prime member since it was introduced (2005)
Okay, now that all that has been said, I am in a quandry. I absolutely loathe the awkwardness of watching Prime movies on my tablet (I also curse Amazon regularly when doing so), but don't want to give up the ease of use of my current tablet. Since I have had a Fire, I know that apps can be sideloaded and it doesn't take rocket science to do so. I also know that there are some apps that cannot be sideloaded.
I can't hold onto my GTab forever. I am hard on my devices and I also use the thing
constantly, both at home and work. I've ordered the Kindle Fire 8.9 and am keeping my fingers crossed that it has enough appeal so that I replace my current tablet. I think that the combination of my new
S3 with the larger screen can sub for the Fire in the instances where I can't use the tablet.
So that's not telling you which is better, but maybe you can get some insight based on my scenario