Easy answer then: Retro Hawk motor.
The Falcon 7 and TSR motors are kind of a "legacy" thing. IMO, they should be dropped from the list since they aren't readily available (to my knowledge). And the Professor Motor motor was never competitive. If that one isn't readily available, it should be dropped as well. But, that's not my call and I'm not all that concerned about it
I don't speak for anyone but myself, but since I'm recently back to racing, I don't have a smidgen of the collective experience and/or resources of the talented folks here on Slotblog.
So, I look to the rules and try to find the items for which I feel comfortable spending my hard-earned (retirement check) funds. The only source of experts that I have reasonably available, aside from my mates at Tyler Slot Cars, are on Slotblog and other Those Who Shall Not Be Named sites around the Interwebs. Therefore, I ask the questions because I want to know and I AM concerned about wasting money on products which are not readily available nor competitive.
My questions may seem like fluff to all those who have been racing at least a decade or longer, but for me, and perhaps others coming into this sport/hobby for the first time, these things matter. Particularly, for those on a limited budget and who live two hours from a commercial raceway. Particularly when there is little or very limited time at that track to test on race day. Particularly when a raceway may not have necessary items in stock for on site purchase even though you want to support that raceway. Particularly...
Again, thanks for the answers.