DC is well worth the wait. Ran an EA for 2 years with no issues, but once I stepped up the power I knew that I needed more. My DC alt is light years ahead of the EA.
I run 14kw daily with a single DC alt and 8 batts and long demo's at full tilt are no problem. Next build will also have a monster DC alt as his stuff flat out works and the prices are reasonable.
Plan your purchase ahead of time, so if it does take 4-6 weeks it won't be an issue. And if you do need something urgently Robbie will work with you.
8-10 of the Team DOA guys are running DC alts in our daily drivers and they all perform flawlessly. Can't say that for some of the other brands we've tried...