I love my IPad 2, this is my second one (had the original IPad, sold it when I won the IPad 2 from work).
I use my IPad a lot when I travel a lot, it keeps me updated on things at home (web access, home email, bill pay).
I find myself using it more and more for things outside of the typical laptop replacement mindset. I use dropbox a lot and have access to all my recipes on my IPad (helps a lot when I am cooking downstairs and my laptop is upstairs). I read on the Kindle application, use at GPS application and to do lists.
I have not had a problem with the non support of Flash, most of the sites I use supports HTML5.
I work in Product Management in the Technolody market, I am an Apple user (so are a lot of my co-workers). We were sent an internal bulletin with the following URL from Adobe on the future of Flash and Mobile devices
Flash to Focus on PC Browsing and Mobile Apps; Adobe to More Aggressively Contribute to HTML5 (Adobe Featured Blogs)
My suggestion is look for the tablet that best fits your needs with software and hardware form factor.