[s o l i d s t e e l]

Which is the best?

We can go manually to collect e-mail addresses and use Intellimerge or do we go with something like mojo... or something completely different. I'm running Apache on Linux, and will be maintaining multiple lists - so a degree of automation (subscribe/unsubscribe) would be excellent.

I don't mind paying for a good manager - but it must be totally customizable - in that I change the HTML which the user sees to our current site designs. Of course it also must be secure!

Will managers based on my server eat too much CPU time and slow everything down?

Your thoughts please!