You should describe main things you would like to do with tablet first. Different models are good for different use cases.
I would say definitely go for Onda V975W then. Retina screen is a huge plus for reading, a pleasure to scroll through magazines and web pages. And price has dropped it's $176 now, so great value too.
Just got my Onda 975w. It's amazing! I highly recommend it. The screen is awesome, the size is great, and the feel is very nice. I got the 32GB model, and ordered a bluetooth keyboard case, so I can use it like a laptop when I want to... Now to wait for my bluetooth mouse to arrive