Hi - I have all those and enjoy each one quite a bit.  I suppose it depends on what you are in the mood for.  The Hulk Omni does cover the 1st 3 Masterworks.  It also has IMHO a terrific run when the Hulk started in Tales to Astonish.  The Wolverine Omin has the great Claremont/Miller mini and Barry Windsor Smith's Weapon X, plus quite a bit more, all of which is good to great.  The other Omnis are great ways to pick up a large run of each title.  I love Brubaker's CA.  Both runs of DD are fine.  However, Bendis' run does precede Brubaker's and leads into it.  So you may want to keep that in mind.  Just my thoughts.  Again, all are quite good.  Hope that helps.  Bob