Ken, i just seen this post. The Ventura system is truely awesome!!!!
It doesn't move around, scratch your paint and is very, very convient to take off and on!!!
I have the sport rack and pack, plus i have the touring setup with 2, 45L bags that zip together. I got mine off of ebay, i think for around $150 bucks!! I think what i have costs well over $300 bucks.
It is also very aerodynamic.