a good bit of good units out there.The Corsair TX850,Antec 850 and a few others.Seasonic is another good brand.It really depends on if being modular is a concern or not.
I love my Corsair TX850, and if you can manage cable well you'll love it too.
For me, modular PSU's means just another connection that can possibly fail. Not pessemistic.... REALISTIC. Anything that passes voltage can corrode, and another connection is just another chance for corrosion.