The tools u mentioned are threat to u r employee privacy.
detail monitoring on employees(passwords of mail,bank,etc..) could lead to many problems if u one of u r employee comes to know this.
For small business,better go for "Squid" proxy
http://www.squid-cache.org/ . u don't need to spend a penny for this.
its free and open source. u can record all the urls (websites) accessed by the employees.
this has many features like,bandwidth control,blocking some sites,url logging...increases u r internet speed and performance and many more....
will be little difficult to configure for beginners. but will be very helpful. trust me