My latest eReader Dilemna

Before I you proceed, if you haven't read my blogs about my eReader experience, please read Part 1 and Part 2.

OK, so now that you are all caught up, you know that I now own a Nook. For the most part I have loved it. I have even re-purchased books, for the 3rd time, for my Nook. I have a few books that I like to read repeatedly and I HAD to have them at my disposal. I definitely like the Nook the best out of the readers that I have owned. I like the fact that I can purchase things via wi-fi and I also like the physical look of the reader. I wasn't too keen on all of the dials and buttons on the Sony, or the weight and shine of the metal. It is a tad heavier than the Bookeen but not by much. It is very easy to use and I do like the touch screen on the bottom. I will admit that I haven't really played around with the web or games feature that much because I have my iPhone for that.

I am running across one major issue at the moment. At the time of my purchase, the books that I knew that I wanted to purchase were available through Barnes & Noble. Since then I have tried to purchase a few random books or new releases and I can only find them on Amazon. *sigh Perhaps I should have gotten a Kindle. The main thing that held me back from the Kindle was the look of it and the fact that the Nook enabled me to borrow and loan books to other Nook owners. Apparently the new Kindle is now implementing the Loaning feature. Hmmmmm
I just looked at the details of the loaning and I guess you can only lend a book out one time. That's kind of stupid in my opinion.

The questions that I have now are:
1. Can I get past the buttons on the Kindle? I don't really like the look of them.
2. Can I change the format of all the books I have purchased on my Nook so that they will be available on the Kindle? Will I need to re-purchase these books yet again?
3. Should I just keep the Nook because of its ability to borrow eBooks from public libraries and still purchase a Kindle? or should I sell my Nook and use that money to buy a Kindle?

The only other option would be to purchase the books from Amazon and somehow find a way to change the format so that I can read it on my Nook.

Any opinions or wards of advice are welcome.