[c-nsp] 3750x Alternatives

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Hi Guys,

We currently use 3750x stack to terminate pairs of 2960S(TOR's) - Our traffic is quite bursty, and we are getting hit with the small buffers (output drops)...any suggestions on alternative platforms? (We only do L2 on the current switches)

6503's w/ VSS?
4500x w/ VSS?
Nexus w/ Vpc?

We dont want to spend a fortune, so potentially the Nexus+4500x are too expensive?

Cheers.