Welcome! I like your taste in tanks and pumps. For your early corals (softies, rugged LPS) those lights will be fine. Once your system is stable (6-8mos?) you can start with the SPS corals.
I am impressed that you gave your tank two months to cycle. Patience is important and it seems you have some. I did not start with much of that but improving on it.
1) Bookmark reef2reef and reefcentral. 98% of your upcoming questions have already been answered in these forums, so search for answers first. When you ask a question, include all your water parameters.
2) Your question about test kits, here are my opinions: salifert for Alk & Ca, NO3; Hanna for Po4 (this one: (
https://www.amazon.com/gp/product/B003UNK3I8/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1); Red Sea for others
3) Watch the youtube series "52 weeks of reefing" on BRSTv. (Bet you did already, but just in case.)
4) Cancel all vacation plans; they are a waste of money and you will just be anxious about your tank the whole time. At least until you have 4 months of success with APEX
5) Ditto
@skimjim get a second income, or second mortgage, or both!
6) For every change you make:
a) introduce them g-r-a-d-u-a-l-l-y
b) measure and document them
c) watch the effects on your livestock
Have fun!