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In an f5 the 30mm super view will show flared stars towards the outter 25% of the view.
This is as a result of both Newtonian mirror coma and eyepiece abberations .
As there only a 5 element there not as well corrected for a fast f5 scope.
There fine for a f10. Resonable for f7.5
I would say stick with plossels as the only alternative for sharp images right to the edge of field will cost you more than the scope for one eyepiece.
Try before you buy as you may find the Andrews 30mm 80deg ok for your tastes. every body have different expectations and you may be able to live with it.
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