I like bitUSD too though the liquidity is not great there and the underlying collateralised asset (BTS) is more volatile so the black swan event risk is higher. With ETH having more stability and more liquidity I think Dai could really be a winner.
That said, I'd prefer the collateral underneath the peg be something value producing like the STEEM Reward Pool rather than a raw crypto, but I'm one who will take the best stable coin on the market at the time. That looks to me like it will be Dai.