This was the first year for me to plant with an 8320, used a 4450mfd previously.  The 8320 will scoot down the road but could never go that fast (16mph)because it bounced too much.  Noticed when the planter was folded and almost full it wouldn't bounce as much(more tongue weight).  So today I had to go replant some beans 10 miles away so I pulled the front weights off.  Drove 23mph all the way there with an empty planter. 

Will see how it acts without an implement, then decide if the weights go back on, this tractor won't do much heavy tillage. 

 The 4450 is a very good tractor, but like you, there are things on the 8000 that I like too.