My opinion on the exhaust is to go with AC Infinity. It's the best you can get and you can use it for every grow moving forward. You will appreciate how quiet it is and how efficient it is.
If it was in your garage you could get something cheap and be okay, but if it's going to be in a closet, I bet you will prefer it being quiet.
In terms of the LED, the one you picked is great. Only issue, allegedly, is that it runs pretty hot.
According to
He reviews LEDs and the one you picked is easily on top 3. I was considering the same one as well, but I might go with the Migro Array 2. Costs more tho.