Thought i should make a few updates here;
There is a typo in my first post but i don't appear to be able to edit it anymore.
Anti-blooming on the KAF8300 is in fact 1000x not 100x. You can thank Starlight Xpress' webpage for that typo.
Also, Atik have in fact released their 694 camera - Atik 460EX.
It is compared with the SX camera over here:
http://blog.astrofotky.cz/pavelpech/?page_id=782
The Atik version seems to rate very well, where as the SX version has a pretty bad set of results.
I have since expanded my views even further and whilst i liked the Sony have decided that either the KAF8300 or KAI4022 would suit me better. At this stage the KAF8300 is winning purely due to cost, but the KAI4022 is a nice looking chip.