For me, above a certain point more cc's doesn't equal better bike. But I accept that to some it does. .. it all depends on what gives you satisfaction when riding.
It's like with with cars... do you want the thrill of a Hemi that will burn rubber at the light... or a mini-cooper S that will stick like glue on the curves... or something that will do both? Well, if you want a motorcycle that does wheelies and rockets away from the red light, then usually the more cc's the better. But if you are just interested in being able to go anywhere you want at a decent speed, something in the 500 or better range will do just fine. Either way you want the best handling bike you can afford.
For years I rode a 600cc bike... it would cruise all day at 85mph... up hill and down... with or w/o a passenger. I really don't know how fast it would go... I had it over 100 a couple times, but then I'd start thinking about flat tires and seagulls and such... and slow down:eek:.The seagull thing... one time I was riding and ahead of me a seagull took to flight, flapping and flapping as hard as it could, but it was coming straight at me down the center of the road and there was nowhere for me to go at the speed I was traveling. Now, a gull is not exactly a small bird... and running into one at 60mph would be like getting hit with a cannon ball and their beak could stab like a knife. I just ducked down behind the mini-windshield with my face pressed against the top of the tank, prepared for the hit and hoping for the best. Fortunately at the last instant it gained enough altitude to just graze the top of the windshield, leaving a bird $hit streak as a reminder of what could have been.
I often took that bike on weekend trips with a group of other riders... we might leave central NJ Friday night and pitch camp in NY, ride to the mountains of New Hampshire and camp Saturday night, return to NJ late Sunday. I didn't often carry a passenger, but I always had saddle bags full of camping necessities and a luggage rack piled high with a cooler full of food and a case of beer. The bigger cc bikes in the group could certainly outrun me on the straightaways... and often did, egos being what they are. But in the curves I always showed them who's boss since my bike handled extremely well, even with the load I was carrying.