Kindle app is free for your phone or iPad; I’d give it a try there before taking the plunge. If reading from the screen bothers your eyes, the paperwhite May be the way to go, but if it’s no biggie and just a price & convenience issue, I’d stick to the iPad.
I’m a book-in-hand gal to my dying breath, BUT...I find myself using the kindle app a LOT more than I originally anticipated. Started out with my favorite study Bible on my phone, looking things up during the sermon on Sunday morning. Then I found a few free books that looked like interesting quick reads and downloaded them on the fly, and I t was even more convenient when I was able to pick up where I left off on the bigger screen of the iPad. Lately, I’ve been enjoying the *usually* much lower prices for kindle versions, and the instant gratification factor of the electronic version; a coworker recommended a book to me, and I downloaded it on the spot and was able to start reading it that day.
Travel convenience is a tossup, for me. I can carry several thousand books in one, thin device, and I always have my phone with me so I can read there, but the electronics aren’t so great in bright sun or near water. The paperwhite screen may do a lot better in the sun, but I still feel safer leaving a paperback lying on my beach chair while I go splash in the pool than I do an expensive electronic device. For a book I’m REALLY into, I find myself downloading it to my kindle app, then picking up a supplemental hard copy somewhere along the line.