Juli:
I just bought an Adventurewagen which is a high top.  I really love it.
You can stand up anytime, no setting up at night, more storage space, etc.
I haven't noticed any handling problems or wind problems yet.
Mine also has a heater and a gray water tank, which are bonuses.
It is also a lot warmer in there than in canvas, making it a real four season
camper.
Downside is that it is hard to fit in a garage and they don't make the parts
for Adventurewagens anymore.
I highly recommend the high top if it is in good shape.
DAR
87 Adventurewagen "Odell"