I've learn't over the past year on controllers. Omni then the S4. I'm looking to buy used CDJ's over the next few months as well (I keep watching STR8's on ebay too and will get a pair when I've got some money)
It's easy to be elitist about vinyl and cd's however, without controllers I probably would never have gotten into this and would not now be looking to increase my set up.
Either way, you still have to feel the music ;)