towing - flatbed or wheel lift?

[libertyc <libertyc@erols.com>]

Which type of tow truck is most likely to avoid damage to our lbcs - a 
flatbed or a wheel lift variety (not a sling-back).  If you go flatbed, 
then you risk having chains crush the spoiler on the way up, and jamb 
your exhaust on the way down.  The wheel-lift type would seem to avoid 
this. It simply picks up your wheels with hydraulic arms.  Any thoughts?