Tak BRC 250 is gorgeous, heavy and expensive although not too bad occasionally 2nd hand.
Carbon Fibre GSO is the obvious one.
Not many start at 10 inches. A 2nd hand 10 inch RCOS.
Orion Optics do a 10 inch ODK I think.
http://www.orionoptics.co.uk/ODK/odkoptimiseddall.html
I suppose RC versus CDK type scopes is worth a look. RC are harder to collimate. ODK are easier. Spot sizes are supposed to be smaller with ODK optics. Orion Optics also offer 1/10th wave mirrors for a relatively small extra cost. ODK optics are faster than RC F6.8 versus F8 or F9.
Mike S Orion Optics UK AG scope seems to have a very good mirror and is a great performer.
F6.8 is fast but not that fussy. As you go shorter F ratios the optics become more fussy very often unless you stick to APOs.
Greg.