The possibilities are endless. My thought on all of this is as I previously stated, if it ain't broke... Right now I have a (6) month running tank that, other than a few bumps, is really thriving.
I would love to give my tank a cleaner more modern look with all the bells and everything, but in the end, it looks great and if everything is happy, I'll be happy to not spend $1500+ on a wave maker, PH's, and a controller. Not to mention a titanium heater, skimmer, better / quieter return pump, ATO, etc.
I do have a bad feeling that in about 6 weeks when I've filled the tanks capacity for livestock, I'll start eyeing all that wonderful equipment.