I've decided I'll keep the iPad....actually, I'll keep both ...
The iPad is growing on me. I can't use it for long reading sessions, gives me a little bit of eye strain, but love Goodreader and the way it handles PDFs. Zinio, when not perfect for all magazines is awesome too. Just bought Car and Driver and National Geographic and the experience is really nice. Being able to run Netflix moved the balance on iPad's favor too; I don't have Netflix on my Galaxy Tab, at least not natively.
I will keep the DXG though. The iPad is way much better for PDFs but I still prefer the DXG for reading my computer books.