Mark,
You have a number of options. Two of these are:
1. Cisco Catalyst 3750G-16TD (16 Ethernet 10/100/1000 ports and 1 10 Gigabit Ethernet XENPAK port). You can use Cisco StackWise technology to daisy-chain nine of these switches.
2. Cisco Catalyst 4503- up to 108 10/100/1000BASE-T ports supported with 2 10GigE ports.
Hope that helps - pls rate posts that help.
Regards,
Paresh