File formats of the aztak is more than the JBL.
I'd not use it to read PDF files, but is excellent for Epub!
If you're lucky you get one with a firmware where basic TTS is enabled!
My one gripe with this FW is that I can never turn off the device,or it'll freeze and I'll have to reset it. But even in standby it lasts for many months!
Other firmwares enable in-document hyperlinks (more than what the Jetbook could do).
As far as the pink, you'll have to regularly check back. They have readers in and out of stock all the time, varying stock almost weekly.
I got a white one. The black one is sold a little more expensive (like $19 more or so), and was there a few weeks ago.
Just check regularly. A week ago they had a white one for sale!