DSP vs Head Unit

Currently I have JBL MS-62C components powered by an old Zapco AG 350 amp and then a sundown sd-10 powered by a PG RSd600.1. I want to try going active, but currently my amp and headunit don't allow me to. I was wondering what would be better. Getting a head unit like a Pioneer DEH 80PRS and then getting a 4 channel amp or just running an MS-8 and then running the tweeters off of it.

Thanks for the help!