HI. Active speakers are way to go.They went down in price it is much better to get them than passive speakers.And you can chain them too if you want to add more speakes.The thing with passive speakers is they sound different with different amp.So if you want maximum from them than you really have to know what you are doing.Active speakers amp is already tuned to it's speaker,and result is much better.
You have a lot of choice there.From QSC K seria,or JBL PRX600 seria,RCF Art seria,Yamaha DSR and DXR.Although I didn't like dxr that much.Even old mackie 450's still sound good.Ev ELX seria.
It all depends what you like and how much money you want to spend.Also active subs make a big difference in sound.