Looking for Calendar recommendations

Hi all,

I have been in search of a Calendar package to incorporate into a site now for about a week. I need something like an event Calendar, where the person can click on a link in the calendar and be taken to another page that explains it in detail.

I need something with an admin backend so the site owner can enter the data for the events. I will build the linked to pages, as the events are mostly classes that the client teaches, and won't change that much.

I need to be able to customize it with css/html to incorporate the look and feel of the site.

We don't mind landing on a commercial package as long as the cost with options is reasonable. I have done the google searches and all, so I am looking for replies from those that have used something like this and don't mind recommending a package.

Thanks,
Barry