Nice build thread. I would add a 2nd heater and a heater controller (don't trust a single and don't trust the cheap controllers). The 2-heater controller will be around $120, so that puts you into the Apex Jr ($149.99) category.
The Apex Jr. can control 4 outlets. You can add an 8 outlet extension so you can control a dozen outlets.
units are good for a 24" spread, so get 2 units. You can start with one and center it, then add a 2nd unit later. It's a one-time purchase so get the unit you want.
I went all in for my LED
's (3 units) as my 4th lighting system. Should have spent the dollars up front (though LEDs were not really an option in 2003). Don't make my mistake(s).