I have both, and the BMI is far and away a nicer chassis than the 3Racing setup. On the 3Racing chassis ALL the edges are rough and either needed filing and/or CA. There were literally five screws on the bottom that stuck out from the chassis, their idea of countersinking holes is ridiculous. I couldn't mount a motor (ANY motor) because the top plate was in the way - moved all the way in the pinion wasn't even touching the spur gear. Had to Dremel a big notch in the plate to get the pinion to mesh up with the spur. There's no provided space for an antenna mount, and the top plate is so narrow that it limits drilling a hole for one. There are only two holes for the turnbuckle ballstuds on the upper deck, front and rear. The battery posts have two sets of holes, the upper being too loose (packs literally can fall out) and the lower being almost too tight - no way of adjusting the battery posts short of maybe putting shims under the posts themselves or Dremeling them down to fit. I really can't think of ANYthing good to say about the 3Racing chassis other than it was cheap. In contrast, the BMI chassis is absolutely beautiful on just about every level. As far as performance, the 3Racing chassis ran okay.. but it was nothing spectacular.
For my two cents, save the cash either get the BMI chassis or wait for the Associated one. The 3Racing chassis was a *huge* disappointment for me, since all the other parts (shock towers, etc.) I've tried from them have been fine.
Kufman, we're usually at AJ's on most Saturday afternoons.. if you want to take a peek at the 3Racing car we'll have it with us anytime we're there. Feel free to stop over and check it out.