Get the memory man with hazarai. Based on what you want, I think it will be a solid choice in the long run. (there are knobs on it to add ambience and darken the tone I beleive).
If you really really want a 300ms analog delay, try analogman's AR20DL. Very warm, very organic. Gets a little lo fi at delay times past 3 O'clock....but hey its analog not perfection. Also fairly cheap at $150. This is my go to, do everything delay.
For the price of a brand new EH memory man deluxe you could almost get both the SMMH and AR20DL.
Stereo Memory Man w/ Harazai also has 300ms. All of the settings are (correct me if im wrong)
Regular:1 sec, 3 sec, 300 ms/mod,
Multitap:1 sec, 3 sec, 1 sec+rev
Other: Reverse Echo, 6 second Looper, tap tempo
it has a filter and decay knob also, filter controlls the ammount of bass in the delay/loop (it can make loops sound extremely dub like when turned all the way bassside) and decay adds a reverbish sound to your delays. The decay knob while looping something can be turned all the way to the left to play back your loop in reverse. While the loop is going you can also make the pitch up to one octave higher or down one octave lower by fiddling with delay times. You can also manipulate it with the filter controll.
While a loop is running you can switch it to a different function and play over your loop with that certain delay setting and blend accordingly with the blend knob, or by not changing the setting (leaving on loop but pedal still on) you can play clean over the loop.
Not to mention by holding the Harazai knob for 3 seconds you can save a preset into your pedal.
Now after hearing that, why wouldn't you go for this with it being a cheaper price and containing many more functions.
This may seem bias considering I own one but it really does have all of those functions.