I have a Multiplex that Iv'e posted a clip of ... I've seen some describe it as the best sounding delay.
Toe-Knee: please note that the Rub a Dub Deluxe is a new circuit, that uses a new Belton brick, and has controls for Mix, Tone, and Decay.
I can also recommend another of Josh's boards, the Cardinal Tremolo -- it has a rather unique circuit based on the harmonic tremolo of early 60s Fender amps, and sounds great. I've also posted a clip of that.