kinda new getting into fa stuff...
what is the objective best white sneaker? not looking to spend more then $300
Depends on your style my guy if you want a clean/fuckboy look get stan smiths which are pretty big right now so you won't have to worry about losing labels just yet. If you want to get extra into the hipster look get cdg converse, since you have that much dough to throw around
there is no objectively best sneaker. It's a preference thing, so you buying what you like is going to be what's best for you.
However, you're prolly referring to people who have been into fashion for a while and you generally shift preferences a bit the longer you've been interested.
I think Converse Jack Purcell look great, they don't look like every other shoe with their distinctive look and they have a nice silhouette. Also they aren't very expensive.
I have a pair of Converse Jack Purcells as well as a pair of >>10961619 Achilles, both are good options but the JPs will set you back ~100$ and the CPs will cost you 400$.
Go for whichever sneaker you think look the best and you can't go wrong - I recommend the Converse JP!
If you want to find good clothes and shoes just search polyvore.
(My username on it is Cheapstyle, cuz I only pick cheap things because I act like a jew)