3W 75, 85 B2, or BME 102/105 for the H9 Sukhoi??
You will not have unlimited performance with an 80 or less. I just flew a buddies we test hopped this past weekend with the BME 102. It ran great and had good vertical. Highly recommend the BME 102/105 or the DA-100. Oh! with the BME-102 it weighed 26#. All standard stuff and no smoke.