I'll go ahead and throw out the Earthquaker Devices Disaster Transport Jr. I've tried quite a few delays in my post-rock days, include the Carbon Copy, Echo Park, Nova Delay, and DL4 to name a few. The reason I've stuck with the DT Jr. is because of the *tone*. It just sounds so good! It really gives me a nice warm, organic tone with a hint of degraded tape. And the tone knob for the repeats is genius. It really helps with dialing in the just the right about of texture and how in-your-face or subtle the delay effect is, which is really crucial when using delay on bass.
I really liked a few of the models on the DL4, but for whatever reason, I decided I didn't need a delay pedal that large. Thus began my quest to find a smaller pedal that captures the warmth and feel of the DL4. The Echo Park is too digital and has too many operational issues. The all-analog Carbon Copy is organic, but a little too clean and pristine. The Nova Delay really only does digital well, IMHO. But the EQD DT Jr. (and probably Sr. and original too) gets a good bass response, with solid but simple tweakability and a unique lush repeats tone. You would never guess it was an analog sim.