Im not a fan of the new line engines, seems they always have so little issue. All brands have troubles with the first roll outs. Keep in mind, I never said go engines were bad, their just new on the market.
Ive had every brand made, OS v-spec are nice, rb was ok, novarossi are good, Im running a sirio this year and its performed flawlessly.
Whats your budget? Under 200 look into a novarossi 3 port, 250 would be a v-spec, 300 plus is your sirio rb grp ninja range. Have even more than 300 to spend, OS speed.
A reminder, turbo plugs cost more than standard plug, so if cost is an issue, look into a standard plug vs a turbo plug engine.