Best place to buy new sneakers?

So, I need a new pair of sneakers. Mostly for walking, a bit of bike riding.

I want to find someplace that has a big selection and decent prices.

I don't need a runner's shop or someplace specifically with great expertise or testing on treadmills, etc. (while that's all nice to have, I don't really need that right now).

I just want someplace that actually has STAFF that can go get the shoes I want to try on (walked out of Paragon last time after sitting there for over 20 minutes trying to get some help).

I hate white sneakers and like several different brands, so boutique-y places aren't for me.

Suggestions? Brooklyn or downtown Manhattan.


Thanks!