Correct me if I'm wrong, but as far as I know these are 3 of the most popular 3x3's at the moment:
Gans 356 Air
MoYu Weilong GTS2
Qiyi Valk 3
Each has its own magnetic version too to choose from, so you end up with 6 options.
Most of this comes down to personal preference, but the Gans is a little more expensive (around $45 instead of $25).
All of these cubes have been used as main by people which are Sub-10, as long as you're not Sub-10 yourself the difference wont significantly impact your solvetime. I recommend looking on youtube for comparisons and choose the one which fits your turning style.