Well, this is getting a little far afield from the new Valk, but what the heck -- some scooter talk.
1) The Big Burger was a lot of fun, great bike. I did a bunch of day trips to NYC (about 150 miles from here -- Albany, NY, area), which is a massive heat-sink in the summer. Absolutely no heat comes off, except by your right ankle at stops, and the twist-and-go saves your left hand in grid-locked traffic (and nice for stopping on steep hills elsewhere, and you can't screw up max off-the-line starts).
Add a topcase and, with the underseat storage, you have more than 100 liters of space. Great grocery-run machine.
About as good weather protection as my XCT. And electric windshield AND electric-folding mirrors.
Not optimal for two-up riding: could use more power, and the built-in passenger boards require the passenger to be both bow-legged and pigeon-toed. And you have to watch the wheel bearings, what with all the extra RPMs.
Real top speed over 100: 101 per Motorcycle Consumer News and my GPS (although I felt if I had a little more time, I could've upped that to, oh, 102 or 103). The 15" front / 14" rear were stable at that speed in a straight line; stable in sweepers at 90 or so. MCN noted (this is back in 2004) that it was quicker to 60 and in the 1/4 mile than a 750 Honda cruiser they tested the prior month, despite the Burger's weighing more and giving away 100cc or so.
(For those of you not familiar with it, the 650 Burgman has a frame-mounted parallel twin, 638cc, DOHC, eight-valve, fuel-injected, engine. This is not your father's swingarm-engined Vespa.)
Pics: sparking the centerstand at Deals Gap; my GPS, after coming back from a MotoGP weekend at Indianapolis in 2008 in one day on the Burger; loaded for bear, for a two-up week to Canada.
2) I've ridden the T-Max at Americade. A little better handling than the Big Burger: it has 15/15 wheels and is a lot lighter. OTOH, even with less weight, the Burger is faster, off the line and top end. Really. Not as much storage, either, in the T-Max. The T-Max certainly looked better, especially in black-and-yellow. That's me on a T-Max at Indy.
3) This summer, I put the 650 BMW GT scooter (15"/15") through its paces, unescorted, courtesy of the local Beemer dealer (where I know some of the people). Nice engine, but not really very impressed. And the seat height is ridiculously high. Makes me wonder who they think their target audience is.