What advanatge do you expect from being 100% modular ? Most hi end PSU's are hydrid modular. The "optional" cables are modular but the ones that absolutely must be used are hard wired to a) reduce failure points b) cut unnecessary costs, reduce resistance and d) increase efficiency. The last two are marginal but having a modular cable that must be used anyway provides no advantage whatsoever....so even marginal advantages offset 0 advantage in having those cables modular.
For comparison purposes , the list below contains performance ratings (10 scale) at jonnyguru.com / prices as per newegg on 12/31/2010 and ones w/ double asterisks (**) made it onto silentpcreview.com's Editor's Choice List meaning they excelled at both electronic and acoustic performance: