I race slashes all day with my rtr yeti 380 running 3s. I can tell you that if I could drive, I'd beat them. I don't run AVC, although I could, and they run the traxxas version that starts with a T. Spektrum was the first upgrade. I don't regret it. Back to the original subject. Which truck you buy should really depend on the terrain available to you. I have to run on a clay track, or a really bad u4 course. If i run the u4 course, I'm guaranteed to be driving alone, since everyone I know drives a slash. My Yeti eats up the clay track, which is full of rain ruts at full throttle with 3s. It disturbs the slash guys to watch my chassis floating down the track, while their stability control slows them down so they don't crash. If they drove without stability control the Yeti would, and has spanked them. There is a short course track close to here that's well manicured. I won' t dare show my face there. That place is setup for SCT's. I don't belong. I'm still a noob, but I don't regret buying my Yeti. I drove the Score, and I'm glad I didn't buy it. With minimal tuning I can see the Yeti catching up. The traxxas is great if you just want to drive, but if you're a tinkerer, you'll want the yeti. I don't know about the Losi, but it looks pretty bad ass. We joke about it, but if you know anything about multirotor stuff, you'll get why we call the slash the DJI Phantom of the rc truck world.