well i dont know about any for under 400 but i know there is a really nice specialized(thats the brand name) for 420, it gives you the option to change the shocks stiffness for different terrain, its made with quality parts, and has an awesome tire that is like a road tire in the middle but the outside is like a mountain bike tire, but the mountain bike tire wont affect the ride in a city or anything, only when the terrain is bad enough for it to need it... its really cool, check it out , this website says its $440 but I saw one for $420 https://shop.sunrisecyclery.com/item/41762