According to Brent, the vp150 to vp180 trade up was what I thought: you can't get both deals, i.e., you can't order the vp180 on preorder and also get a tradeup discount, so you can't get the $100 off via preorder and also tradeup, but if you don't want to hang onto the vp150 you can order the vp180 after June 1st and get whatever the tradeup value on your vp150 is (based on date of purchase) reduced from the expected price of $695.

"If you try to turn toward it, you go against it."