I just bought a new 2012 Zuma 125. I don't know about top speed, but it should be around 60 mph. I only have 12 miles on it so far, I will find out soon enough. I bought Japanese because I traded a crotch rocket in on it (probably saved my life). But the Agility 125 is just as good, cheaper, just not quite a fancy looking. If money were a major issue, I would have no problem at all buying a Kymco scooter. They are NOT typical Chinese JUNK. I saw a video where an Agility 125 ran off and left a Vino 125, and I know a Vino 125 will do 55, and that is with my 220 pounds on it.
One thing to remember about these small scooters that top out at 55-60 on flat roads with no wind. Just the slightest headwind or an uphill grade that you can't even see can slow them down considerably. Nevertheless, I have put over 2000 miles on my Vino 125 on the freeway without problems, even though it is technically illegal.
I won't spend more on a bike than I think it's worth, but if it's a good deal, I don't seem to have a problem buying bikes I don't need.
2002 Vulcan 750, 2013 Royal Enfield B5
2001 XT225, 2009 Genuine Stella
1980 Puch moped