VF II SV6 should fit in....(assuming your company gets a fleet discount)
the Insignia is a pile of shite, steer away (plus its resale will be close to zero)
you looked at a Kia Optima?
http://www.kia.com/au/cars/optima.html
my son-in-law has just got into one (non turbo version).. very nice comfy and eay to drive
loaded with goodies