Many thanks for those well-thought-out opinions.
Gerald, I hear you regarding too much power/prop torque. I can see where that could cause some problems during structured manuevers.
RcPilet, I hate to go against your grain, but I'm an engine-swapping fool.

I can only fly one at a time, and can only take one big one to the field (a bigger ride is the FIRST thing I'm going to get when I retire). Having more than one plane for a favored engine works fine for me; its like getting a new plane when you re-commission one that's been on the shelf for a while. And why should I forget about gassers? I'm trying to scale UP to this; I've already had a bunch of glow planes. And it is not about being able to afford more than one engine. I've got more in the servos for this model than the kit OR the engine costs/will cost.

I will re-consider a 40cc class engine, but not because I'm a cheapskate.
Bass 1, this is a real quandary, eh? I'm still leaning toward Taurus, because of the instant, KNOWLEDGEABLE help just a phone call way. Call Horizon about one of those gassers, and you're liable to get some part-time college kid who can tell methanol from gasoline two out three times; on a good day.
Anyway, like you said, deciding what to get is half the fun. Research continues...[8D]
So... anybody know the weight of a DA 50 with stand-offs and Pitts muffler???