I wouldn't put to much stock in streetjudge's advice. 2 different tanks.
With his tank he probably has an open top which allows for better cooling just because the surface area is exposed to the air, most of the JBJ28 is enclosed, the only open part is the back chambers. I had the same setup as him, a 24g Nanocube topless with the Sunpod fixture. Can't compare the 2 tanks.
You might not need a chiller but if you don't get a chiller you will need a fan.
I have an Azoo fan hooked up to my Reefkeeper 2 that controls cooling but also speeds up evaporation, either manual daily topoffs or get a good ATO.
SPS in this type tank is simple.
1) Use a good salt (I use Red Sea Pro Coral Salt but Tropic Marin, Oceanic, Reef Crystals will all be the best due to their higher CA levels).
2) Add flow, I have a Korallia #2 in the display but you can go down to a #1 probably or look into the smallest Tunze Nano Stream Powerhead.
3) Use a 2 part when you need to dose. A good salt, weekly water changes and keeping the number of SPS low should be enough so that you don't have to dose. If you need to though Kent Nano Part A & B or B-Ionic are 2 good options.
If you get some SPS the easiest ones are Millipora, Digitata, Monti Caps and Birdsnest. ORA pieces are usually very healthy and hardy and I am a huge fan of them, they hold their color and do very well when first getting into SPS. Avoid wild caught SPS frags/colonies like the plauge.
I have an Onyx Clown, hosted a Torch in the old tank but every clown is different.
I have a build thread for my tank, it's still pretty new and I hacked down most of my corals and sold off the larger pieces but pictures can be found here:
http://www.reefsanctuary.com/forums/nano-reefs/30772-illuminatis-mysterious-nanocube.html
There is also an entire thread in the Nano Forum for owners of the JBJ 28g:
http://reefcentral.com/forums/showthread.php?s=&threadid=1314926
If you get it good luck, it's a nice tank.