I'm working on a limited budget (who isn't) and want to upgrade my 6509's running a Sup 2 with an MSFC card to something a bit newer. I'd like to be able to go for the Sup 720's but I doubt I can. Would the Sup 32 work? I need a full layer 3 ability as this is my core router and switch.
The SUP32 is a good alternative (and cheaper too) to the SUP720. It is very capable and robust supervisor that can do most of what a SUP720 can do. The only difference is that it can't handle the load of a SUP720. Here are the datasheets for both and you can compare what is best for your network.