RE: $100 what to do?
I have a couple of the Phoenix Stregas listed above. A very nice arf and quite fast. I have a Jett 50 in one and just stuffed a YS 1.10 in the other. Had one with a YS 60SE in it but a bad battery turned it to dust. That is a great bang for the buck and Tower has free shipping right now so it will only cost you $99 to your door. Any one of the engines you listed will be very impressive in the Strega.
Providing they both survive our pylon races in a couple of weeks, I will have them at Rabbit for the Revver bash.
Blessings, Terry
Revver Bro #180