If you are looking for 10 to 14T, you are limited to 10.5 or 13.5, and any of the name brands, like Hobby Wing, Team Orion, Yokomo, and Maclan are good choices. The cheapest of those are from Hobby Wing, which start right around $100 US. Take a look through this site:
https://www.hobbytown.com/sensored-...ric-motors-escs-electronics-cars-trucks/c2931 Any of the listed 10.5 and 13.5 would be good choices, but some can be very expensive. For a slightly cheaper alternative, there is this one:
https://www.amazon.com/SkyRC-Cheetah-3250KV-Sensored-Brushless/dp/B00Q37VRP6 but, personally i have never heard of that brand. You usually can't go wrong with Hobby Wing though.