I feel the Vector, Impact M2 & Impulse suspension wise was stronger the the 733 & 966. Health wise I sold my 733 & 966. Sold the 960, wish I hadn't cuz I could of converted to a 966e, electric version. I've been out of the racing seen for a couple years now. I give some help with people I meet at a local track.
Impact M2 was quick enough as the 8th scale, just a tad cheaper. Too bad it died down, But if you find some one who does have one. its a gas seeing them out there!!!