Morningstar controllers are great, if somebody didn't blow them up.
Being great comes with a price, like being easy to blow up in the wrong hands.
The SunLight is nice, if you need the "light" part.
If you do not, then get a new MorningStar SS-X for about the same price.
The SunLight is a fairly new item, and I would be concerned WHY it was removed from the system.
I recommend waiting until you have the panels. $50 for a controller that you can't use is a waste. $50 for a blown up one is worse.
The free panels will cost a lot before all is said and done. Installation, controls, wiring, etc.
G-