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Doh! Dunno how I missed the flattener in your sig.
The ICX-694 sensor is pretty popular around these parts. It has low read noise and good QE but only small pixels and it's not a big chip. On your scope it would give you an image scale of 0.46 arcsec/pixel. That's probably way too small. Binned x2 it would be 0.92 arcsec/pixel which would work well. Overall FOV is small at 17.1x21.4 arc min. Good for galaxies but small for a lot of other DSOs.
I wouldn't bother with the KAF-8300. Image scale is not a lot different to the ICX-694 but it doesn't handle binning as well. It's a little bigger overall but also has higher read noise and dark current.
For a bigger FOV you'd need one of the big boys: a KAI-11000 or a KAF-16803. These both have 9 micron pixels giving an image scale of 0.93 arcsec/pixel which works well. FOV would be 41.3x61.9 arc min for the KAI-11000 and 63.3x63.3 arc min for the KAF-16803. These would give you a nice FOV but will be spendy and you'll need a hefty focuser.
Hopefully that gave you something to think about. I think the big decision is how big a FOV you want and whether you can afford it.
There are some new large sensors about but I'm not au fait with the specs. They won't be significantly cheaper if you want a big chip...
Cheers,
Rick.
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