I have the MXR Phase 100 and love it. It's more tweakable then the 90 to get just the right tone, but still simple enough for a knuckle dragger like myself to understand.
The Phase 100 is a great phaser, better for bass than the Phase 90 IME.
For delay, I use a Danelectro delay unit (can't recall the name right now) - but I don't use it on bass often.
The Electro Harmonix Memory Man is a fantastic delay unit that one of our guitarists has used for years - the Memory Boy looks like a smaller footprint version. Not sure how it would be for bass, but it is crazy tweakable.

