Well, too add to the dilemma, you could buy 2 more of what you have! My first tent was like that with led. multiple 100 watt panels. Mine had holes in the corners so once hung I wired them (not electrically) together to hold them in "formation" in the tent.
I bought one light when seeds hatched, another in veg, the balance in Bloom. They have since been replaced, but still come in handy for an extra veg, clone, mother, etc use.
Bubba
I went through the same thing with every purchase. What would I do? I just recently did. I bought the FC-E 6500 and have no remorse. Any of the ones you are talking about Would as well. I finally reached that point of "Ya picks your choices and Ya pays your money" and pull the trigger.
If you havent already go the the cocoforcannabis site and read their info. They explain very simply about what they measure and why. Then test a bunch of lights, including your spider farmer, the Mars Hydro lights (THEY said the Bridgelux (FC-E) lights tested superior to their samsung counterparts.)
On the other hand, it may just make the decision more difficult. One day there was a flash sale on MH site, my light was well under 500, and I pulled the trigger. Had my doubts, worried for nothing.
Bubba