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I "got around" the need for aperture by using a fast refractor - the FSQ-106. If f/5 isn't fast enough, you can go to f/3.65 with the reducer (and still maintain perfect field flatness).
All that goes soon, as I traded my FSQ-106ED for an FSQ-106N, so will be "stuck" at f/5, but I am not particularly upset. f/5 to me is a nice balance between depth and FOV. f/3.65 is a little too wide for my aesthetic tastes.
Anyway, if you want a QUALITY imaging Newt that requires absolutely minimal fiddling and holds collimation for a VERY long time, consider the f/4 Vixen R200SS. Only downside to it is the thick spider vanes (which is how it maintains secondary collimation so well) but these can be milled down.
The Skywatcher Quattro's seem to be almost clones of the R200SS, though somewhat cheaper. Heard OK reports on them, but holding collimation is NOT as good as the R200SS. GSO "generic" imaging newts need SERIOUS DIY work - mirror springs, secondary pinching, focuser etc. If you are willing to fiddle, then they are a good cheap beginning.
I did own 3 R200SS, and I can wholeheartedly recommend them. The figure on the mirror is superb. Also has a proprietary flattener that seems to work as well as the Baader MPCC.
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