I too still am enamored with my Pad.
Only concern is the weight with extended use. Kinda painful if I'm reading a lot and I have to position myself in the recliner to just simply rest my hands. There are several cases that help and don't add too much weight. I prefer the portfolio/flip type cases, color/style abound.
I own the original iPad and the speed/battery are still quite acceptable. I am curious how apple intends to improve on the third model, weight must surely be considered as my wife's iPad 2 did not add much when I compare side by side, daily use.
I find myself rarely using my iMac or wife's MBP, again, rarely. There simply is no reason as I do not print that much. I have a iPhone as well and still prefer using the Pad.
I have not used the Kindle nor Nook products. Have quickly looked at a Nook, seems pretty svelte to me, but not being integrated with my other Apple products/software limits use for me personally.
If I had to buy a gift for a friend, I'd probably look at a Fire or Nook. The price cannot be beat. For a stronger upgrade, the Galaxy products seem to be the top choice from what I have seen/read. Were I not a Mac head, the Galaxy 7" would be most appealing.
For healthcare folks, the iPad software choices cannot be beat. I rarely pick up my large text books anymore! Never a PDR.
My $0.02, Regards.