3750s stack or Catalyst 6500?

i'm working in a government health network and we actually have a Cisco Catalyst 4503 as a Core Switch with a bunch of 2960Gs and 2950, etc. My question is regarding the best solution to have for having the Core Switch to change.

Scenario 1: 4x Catalyst 3750 24 Ports and 1x WS-C3750V2-24PS-S    12 ports all 5 stacked

Scenario 2: 1x Catalyst 6500 48 ports and another one 24 ports SFPs

I think both scenarios would be approximatly the same cost or around it, but it's not a matter of money. I would like to know what would be the best solution for us for scalability, fault tolerance, network management, etc.

The only flaw that I see going for 6500 is that it doesn't give me redundancy in terms of chassis. If you are planning to go for two supervisors in the chassis, it will be a better option.

1) You can add/remove modules from 6500 as & when you want without having to pay for any other switch, I assume that the modules would be cheaper than buyig a whole new switch.

2) It gives you more backplane speed.

3) Hardware forwarding.

4) Most of routing & other functions would be handled in hardware.

Overall, 6500 is much more advanced than 3750.

So, I would go for 6500. For more details, I would suggest going through the datasheet of both these WS-C3750X-24P-S    switches.