Interesting question.

personally…. With money no object…. I would say 2 eclipses as it would make the routing possibilities more flexible.

usually you might run Reverb last in the chain, but sometimes you can get some great results running reverb into a delay…. Also had some good results running chorus after delay ( and I do not like typical chorus sounds )

the Factors are great mind you and you Know I love them..but I love freely routing of effects in an ideal world.

having said all that… If I had the money for 2 Eclipse..I would probably  buy an H8000 or an H7600