I would keep my Oasis: I just don't like the size and the shape of the Paperwhite. The Oasis and the basic are much more comfortable to hold IMO. That's one of the reasons why I'm returning my Kindle Colorsoft (same size and design as the Paperwhite.
I think I'm going to buy a Koblo Libra Colour to satisfy my gadget lust
and discover new features and a new ecosystem.
EDIT: I'm NOT returning the Kindle Colorsoft after all but I still love my Oasis and Im definitely keeping it (and when it stops working I'll keep it anyway as a souvenir)