Spam Pack vs. Anti-splog vs. Akismet

Dear Support,

Which one should I choose? Can I have all of them, or it will be overkill? does it annoy the users?

How about the wordpress Anti Spam "Akismet" that comes with jetpack? I have jetpack and loaded Akismet on my Wordpress Multisite and followed your instruction to activate Akismet across the whole network using one key by modifying the wp-config file.

Thanks,

Imad Daou