I went down to the dealer yesterday to check out the 400i. I found out that they had JUST received the Xtowns as well, one was built up already.
My biggest question about the Xtown has been, are the front footrests still too short for anyone that can sit on the bike without tipping it over?
The answer is NO, they have moved the footrests forwards, and it now sits exactly like the Xciting series of bikes.
Under seat storage: Visually, the 400i has a similar amount to the XC250, which is to say a decent (not Burgman-200 like, where you can stash a dead body, but decent) amount. The Xtown has even more, but its shape reminded me of the storage on the Forza (long/narrow).
Weight -> center stand: The 400i is about as easy to put on the center stand as the XC250. The 300i feels like a feather in comparison, and is extremely easy to put up, and I'm having a hard time believing that the bike weighs 430 lbs. based on how easy it was; I put all my 260lbs of weight on the center stand and almost thought that the bike was going to fly off the center stand due to how fast it got in the air.
Top speeds: The dealer was not doing test drives at this time. My highway travel is typically 70mph; the old XC250 was entering redline at 65mph so I didn't go faster than 65 on the XC250.
I am sure that the 400i can do 70 without redlining (the XC500 redlines at 75-78mph), but I wanted to know what speed red line was on the Xtown. Even more interestingly, there was no indication of red line on the tachometer, even though it went all the way to 10,000rpm. They said they would make some calls to find out; I will keep you posted if they are able to come through on the information.
No storage box options are available for either bike at this time, unless you're comfortable with building your own mounting plates; the grab bar/trunk mount assemblies on both bikes are different from the previous Xciting grab bars/trunk mounts. The Xtown grab bar had what looked like a flat platform which might be suitable for repurposing, for this, but the 400i did not.