Without a doubt those are not equal to your 6010. I would suggest a VT60 which will equal the 6010 (actually a little better blacks) in performance. That may be easier for them to accept based on price vs. the ZT. ZT may be a stretch - I could see that argument for an Elite. You could also look into the Samsung 8500, but again based price try the Panasonic VT60 - in the 60 inch size of course. Let us know how things go - I would also like to know the warranty you have so I can avoid it (maybe).
Panasonic 60VT60 (cal by DNice)
Denon 5200 w/ Outlaw 2200 Amps (3)
Ascend Acoustics Sierra 2s F/R & Horizon w/ RAAL Center; Sierra 1s Surrounds; DefTech PM1000s Fronts & Top Middle w/ PSB S5 Rear Surrounds; PSA v1800 & SVS PC12+ Subs
Oppo 103; Onkyo HD-DVD; Apple TV & Roku/Fire Sticks