i think, too, it depends on what your intentions are....
if you want one helluva ring, weighty or with lots of detail work, maybe teeny pave work, etc... one ring you're gonna wear every day, and (possibly) pass off as a diamond.... well, then you're probably gonna want the best sim you can afford. probably. whether that's gonna be a Moissanite (or if you're gonna just call the Moissy what it is, and not try to pass it off as anything other than incredibly sparkly), or an Asha or a Winfields or a ChrisCZ or Diamonique or whatever.
but if you're still trying to figure out what your forever-ring might be, or if you just enjoy switching things up frequently... especially if your budget is microscopic. well, then a ChrisCZ in a silver setting might be just the thing!
i have (if i remember right!) three Asha rings, and one loose stone....three LizC/WinkCZ rings, four rings set with ChrisCZs - and two pendants and a pair of earrings also with ChrisCZs. plus one moissanite ring and bunches of other CZ and diamond rings.
i wear them all, and love them all.
my point is that if you're trying to figure out what shape/cut/colour/size stone you're wanting, then maybe picking up some silver settings and some ChrisCZs might help you decide! his prices are unbeatable, for the selection! and who knows, you might decide to have one of those stones re-set into a gold setting later.