I love Losi, but don't get the MLST!!! It is known for being unreliable.

I have the 1/16th Traxxas Slash, 1/16th Revo's brother, and I love it! It's fast, fun, and durable right out of the box.

The only other good 4WD options that I know of are the Vendetta ST and the RC18T. The Vendetta ST is very low and not fit for grass or really rough off-road terrain. Plus, there are few aftermarket accessories. The RC18T is tested and proven and the accessories are limitless. It is also low, but you can get the RC18MT (Monster Truck) version which has bigger tires. It is also much cheaper than the Revo, but nearly as big or as fast.

I'd recommend the 1/16th Revo or Slash!