I share your feelings.
Ok, I would avoid those cheapy tablets, doubt they will work as you wish and waste the $$. I considered going for an old laptop running XP, the 60 series works good. However in the end I just purchased a nuvi 205W.
If you really want a tablet go for one running XP...
I been reading and re-reading this thread. Checking the web sites everyone has posted.
I reach the same conclusion - why not just use a netbook or even a tablet pc?