Since we are in WA spotlighting for coyotes is a lot harder. I would ignore your budget and save up for a good package, that is lightweight, and easy on batteries. Nothing over 350,000 candlepower.
The lightforce 170's are awesome units but spendy. If you want a rheostat for lighting them up and conserving batteries they probably have the best factory units. The light, charger, rheostat, battery, car charger, and carry bag will add up to about $300.