FWIW, you are better off without Ultimates ... they're soft and sloppy ... and were the first sticks I ever bought.
What would you recommend?
What do you want to play (and then wait for the deluge of opinions) ?
Of the Happ sticks, I don't mind the Supers as an all-around 8-way stick. The fighter folks seems to prefer the Comps (when they aren't talking about Sanwas or Seimeitsus). IIRC, both the Supers and Competitions mount on the same footprint as the Ultimates.
Just yesterday, I was going through my box of sticks and found that I seem to favour Wico sticks in their various flavours (4-way, 8-way, leaf, microswitch, rotary) as they outnumber the other sticks I have "in stock" (e.g. in a box) about 5-to-1.
FWIW, I never got around to replacing the Ultimates in that first cabinet -- it lives at the cottage and, most of the time it is my kids who play it continually and they don't care about the sticks.