[Steven Zahm]

@ Kate

You should go with the template. The reason. You have 300 entries. While the page may load, that is creating quite a bit of server load each time the page is visited. This is not a Connections limitation, the same issue would arise if you were to try to load 300 WP posts on a single page. The template supports pagination too so you can limit the number shown per page. The cMap template defaults to 20 entries per page.

Hope this helps!