Nexus 6001 for small DC as a collapsed core/distribution instead of 4500X

Hi,
I am looking for a switch platform for a small DC that can provide high density 10G and good L3 performance. I was thinking of Nexus 6001 as L3 performance is better thant 5548/5596 and it supports FabricPath. Than I have also looked at the 4500X but I think that it is more a campus switch than a DC switch. Moreover I would like to get rid of Spanning Tree ;-)
My last concern is what is the difference in the buffer capacity (when talking 10G to 1G conversion) when comparing the Nexus 6001 to the CAT4500X?
Thanks in advance,
Regards,
Laurent

Hi,
Any ideas?
Regards,
Laurent

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