I have some experience here---over 75 new bikes and scooters since 1955.
Honda is probably best bet right now in US (if they make model you need) plenty of dealers/good parts service if parts man is on the ball----bikes reliable
Suzuki---many failed dealers x Scooters not so reliable as Honda---had 2 new Burgman 400's--bikes in recent years new TU250(ok but over priced) GS-500 E---rode to 66,000 miles, always ran lean, never broke, 43,000 on original chain and sprockets.
Yamaha---had SR500=ok, new TMAX scooter, fast/handled well/not fun to work on
As for BMW (owner since 1958) once great, now some real junk in recent years, my last new one K-75 (ok)
Kawasaki---ok, had new carbed Concours=ok, top heavy, had one new barge, Voyager 1200,, heavy, well designed, auto valve adjust, faster, than GoldWing liked it.
Harley---had 4 Electra Glides, heavy can break often, work best at 55-60mph, but shake, three sportsters=shake, but do not break often.
Kymco working fine for me right now