Check out Intellijels Rainmaker. I have both Beads and Mimeophon, and theyre awesome, but the Rainmaker is on a whole other level. Its a bit pricier than the others but its a super textured delay powerhouse.

I dont have and havent used Sealegs, but between the other 2 it really depends on what you want from your delay. If youre interested in granular stuff, go with Beads. Otherwise i'd choose Mimeophon, personally. Its defintely a more textured delay. But then again being a delay is not what Beads does best.