Next toy after Heylix Syn Trident?

I have a Helix Syn Trident and njoy wand — looking to purchase my next toy. I can buy 1 or 2 max, right now this is my short list:

Njoy plug — I do not have any butt plugs, but I think these would be good for a prep-session?
Progasm Ice — large size (fullness) and ice (less friction) might be good.
Eupho Trident — keep on hearing good things this, yet seems similar to my Helix.

I had my first prostate orgasm last week and I want to continue my journey.