What new pair of lacrosse cleats should I buy?

if you have a thin and long foot you should probably go with a nike. But if you have a wider foot you should probably go with a warrior for a more snug fit.

You can use any football cleats, they are made for grass fields. I recommend that you get cleats with tips you can remove. I had molded cleats all through high school, and when I got to college, I tried cleats with tips I could change out, I used plastic 1 inch cleats, but you should check on the allowed length with your coach. Get the longest allowed, it makes a Huge difference, they bite the grass more, and you feed don't slip as much when you making quick turns.

Personally I use the Nike Air Zoom cleats. They were originally made for rugby but they have good support in the ankle and once you've broken them in they feel like a part of your foot. Plus having inter-changeable studs is a real help for changing field conditions.