cgiemail is supposed to be secure, in the sense that it logs the IP address in the email header of each message sent. Therefore, if you had someone using your form inappropriately, you should be able to determine who to report them to.
I've not heard of the other scripts you mention.
You are welcome to try Gypsy Mail
, which is a script I wrote. It is a clone of cgiemail, designed with security, ease of installation, and flexibility in mind.
P.S. You can try Gypsy Mail out, here: