Yes, for the bootable 60GB SSD you can install Windows 7, AV and anti-malware (if you use Windows Firewall then that will come as part of the OS install), otherwise install that too if its a separate program. You will still have loads of room left. Don't forget all the Java and other little requirements etc.
I have a OCZ Vertex 2 and have installed Windows 7, NIS2011, MBAM and the full Office 2010 and a few bits and bobs like 7ZIP etc. etc. and still have 40 odd GB fee. You will still have plenty of space.
I speak under correction, but I recall a mention that an ideal buffer was in the order of 20% free space.