Looks good so far! My only suggestion would be to open up your rock work a little more even if that means you have to remove some pieces. I had a similar setup and a few months into it, I had to re-work it all. I didn't account for the rock that the coral would come on and it wasn't fun being 3 months into it...
Totally up to you though. Also, do you have any additional powerheads in the tank other than the stock returns? If not, you may look at adding 1 or 2 to help with the flow so you don't get any dead spots.
Later down the line, if you decide to look into RODI
units, check eBay. They have units on there that are around 50 bucks which work great. Tank looks great and looking forward to tagging along!!