So here's what I have 01 silverado 2500hd crew cab Pioneer deh-80prs 6 1/2 cadence mids (150w rms) 2" tweeters (100w rms) 10 id max sub Under seat box Rockford 400d4 amp Audio pipe mono amp 1200w rms Exide Agm battery

So this system was built several years ago I can't really remember all the specs sorry but I haven't touched the trucks sound system in a while

The battery is dying The Rockford died a while ago The head unit hasn't really been turned on

But looking to redo it but differently Have a family now so want to change it up I still am gonna keep my 2 way active system, but want have to get a new 4 channel amp (cheap is good for me right now)

Also gonna put in a iPad mini in the dash is there a way to put a overhead monitor that can sync with the iPad?

I'm sure the sub and amp still are ok so I'm gonna stick with that for now.

Any other suggestions? Has battery technology got any better? Already done the big 3 too.