Marlinmike
Guru
Ski is very much on point, good friend of mine I fish with has one of the belt driven 3600rpm gens and between noise coming from engine hatches or the obnoxious exhaust splashing I'm not sure which is worse, on the upside he doesn't leave it running long as everyone complains about it. Recommend you that hear it first hand, personally the Honda is much more user friendly.
Tough one. The 3kw belt drive ones are a bit rough and noisy, but pretty reliable. The 4kw Farymanns are POS's. The 5kw Northern lights is the cat's meow, but probably too big and heavy for your 28. Expensive too.
Probably the best go is the Phasor belt drive. Just don't expect it to be silky smooth and quiet.