Grumble, so, after spending most of the weekend researching the subject, decision was made last nite, the best bang for the buck on this would be the Qhy2-Pro. Decent sized sensor, good cooling, great sensativity, and low noise, all in a package that lands at a price point that wont stretch the budget. So, I phone the canadian distrubutor early this afternoon to order, and the response is:-

'Out of stock, discontinued item, likely cant get one anymore'.

I guess now that they have started shipping the 8.3 megapixel monochrome monster, they aren't going to be making the mid range one anymore.

We are back to square one choosing a camera....