Are you aware there's very limited availability and you might not find the bike you want at any store.
If you're willing to take the LIRR for a ride Brands in Wantagh is a block from the station and sell most major brands. Everything from kiddie bikes to pro level race bikes. I've dealt with the staff for many years and most know their product lines. Also no attitude I was treated the same buying my wife a $600 as I did for my expensive bike.
https://www.brandscycle.com/