[j-nsp] EX VC mixed mode experience

[Riccardo S]

I'm wondering if anybody have info or experience in a scenario
 with mixed virtual-chassis (6 equipments between 4500 and 4200) with high density 
(more or less 70) of 10GBs ports.

Since these architecture should be placed in a
 very sensitive position (servers and storage managing online systems of an important airport), 
I'd like to have some "informal" feedbacks if any problems or whatelse have been experienced by somebody...

Why chose this design ? only costs...

Tks