Well, in my opinion you won't get a delay pedal much better than the DD-20 - but then I didn't like the Delayla, so personal preference has a part in this.

If you want to stop messing about, buy a TC electronics G Major. I've had one for years and it's brilliant. I'm about to go for a G system for the midi control and pedal connection options.

What exactly do you want the pedal to do damn well?