really depends on the scenario.. for any requirement which has more than 4 uplinks, we will have to look for a 4500 or a 6500... if you want to connect 14 uplinks, you can basically look for a 4506 (withouth sup redundancy) or 4507 (which has SUP redudancy) or a new brand of 6500's which is 6504 E with SUP 32 (which will have 8 fiber ports).... featureset wise, 6500 is far superior to 4500...

hope this helps.. all the best.. rate replies if found useful..

Raj