I think I would come down to a Dark Magic, New Breed, x-Convict, and Atmosphere. I’ve never played any of these however, I’m just basing my opinion on specs. Most of it is preference however.
I’ve not heard of peopl using the Zwei for 1a. There’s so many different yoyos up there, and my guess is that you don’t have that precise preference yet. You really just have to pick one as they are all good enought to do all the tricks in the 1a section on this site. Just look at all the picture and see which one you like the most.
xconvict is a very smooth yoyo small
dark magic is also a smooth yoyo but its big
new breed is also a big yoyo but i have trouble with vibe
i have never tried the atmosphere but i hear good things about it