Pop over to
http://astrovideoforum.proboards.com
Totally dedicated to eaa. Also there's a section for EAA on cloudynights.
If you want to use an sct for EAA then you will need massive focal reduction to get it down to F4ish. But having said that a lot of EAAERS on cloudynights do that. But then you can only use a small sensor.
You don't need guiding for EAA. If you have the $$
I don't reckon you can go past a hyperstar.
I use an 8"F5 newt and a fast 80mm refractor for EAA. Don't want long exposures. One of the current monthly targets on CN is M42 in under 1sec!