There are a lot of cheap-ish rims on Nashbar right now... they're mostly 28 spoke, but I think that at 150lbs you should be fine riding on 28, even for jumping curbs and stuff. I think all the strength stuff about 36 spokes is hyped more than it should be... that's enough spokes for loaded touring etc., not for a light guy on a track bike.

http://www.nashbar.com/profile.cfm?c...eid=&pagename=
http://www.nashbar.com/profile.cfm?c...eid=&pagename=

MA40s are the same as MA3s, just hard anodized. My front is an MA40 and it's strong. I like the Campy rims myself, though.