Hi David
There has been said that there is no 'tablet market', but an 'ipad market', if you can afford it, go for the iPad, it will do everything you need and do it effortlessly, I'm a amateur photographer and love my ipad, with iphoto and some other tools I can do almost everything I need away from the desktop, plus the App store is rich in all sort of App that simply put .. "Work", no hassle, the thing just works.
I've had the big iPads until now, but Im thinking my next one might be a mini :)