I have started studing for this and have a Cisco ASA 5505 firewall for my lab. Do you thick I will need any other lab equipment?
there is not a lot of material in the 640-553 regarding configuring Cisco ASA's as they are different. for the Topics of VPN, Firewalls, and IPS; AAA, Router and Switch Hardening the questions will pertain to the Cisco IOS implementations of these technologies. The material will expect you to know how ASA's and devices like TACACS+ will work in a "Secure Network Platform." But they won't expect you to configure them, as ASA's use a different Graphical program and the thrust of this test focuses on SDM. You should review the Syllabus for 1.0 of this test carefully available here to make sure you making the most use of your time. And I highly recommend the Catherine Parquet book from Cisco Press, It is very good.
I also recommend a lot of practice with the SDM application, there are ways to get access to it with GNS3