I've got the hlg 260 v2 rspec kit in my 2x4 and it kicks ass 👍Sorry I missed this. I have 2 of the SF2000s. I run them with a Mars Hydro SP3000 in a 5x5 tent. I am about to switch a Horticulture Lighting Group kit with the Mars Hydro. (https://horticulturelightinggroup.com/collections/kits/products/320w-xl-qb-v2-led-kit) and put the Mars SF3000 in a 2x4 to run a couple Blue Gelato 41 from Barney's Farm. I ran two of the SF2000s in a 4x4 for my first run. It was fine. Not sure if it's quite enough for a 3x3 space but it should be fine.
HLG is running a really good sale and this light kit (https://horticulturelightinggroup.com/collections/kits/products/260w-qb-v2-rspec-led-kit) would be perfect for your space and with the sale price, might be comparable to the Spider Farmer light with a little more wattage. I have 2 of the same kits but in the larger side heat sink that I used in my 4x4 now.