You guys are on the right track
Speaking from exp UFOs blow.. no matter how you put it, you are going to be better off with a panel style LED to kind of fit your square feet a bit better.
Kessils and UFOs give off a circular footprint with a very limited "saturated" diameter, the rest is wispy...airy... ugh.....
-Cidly's a good source for cheap, but reliable panels (allows custom ratios)
-Hans and Astir are some perfect micro grow panels (again, custom ratios...if you know what you need..)
I am personally not a fan of em...but... Blackstar Chrome's seem to be decent... but you could probably swipe a BS240 off ebay for just under 200.
If you are not wanting to fully leap into the LED market, one of those choices would probably suit you...
though I would say Astir knows their shit, and shouldnt even be referred next to Blackstar.
Now... if you are wanting this for a primary light source... and are planning to run this for a long time... first off...
for us previous HID ppl... we need grounds to know how much is 'nuff... I always ran by wpsf, always shooting for 50 for veg, 80 for flower... (fuckin 120+ for CO2!?!? has anyone done this!?)
Well, in the LED market, Ive seen ppl narrow down to 30-70 would be the equivilant to that... DO NOT TAKE THIS AS A GUIDELINE, this is merely an estiimate that I've noticed to trend along..
I am a wpsf whore, used to run a 400w HID combo in 3.905 sq ft, then 290w of LED's (two seperate panels), NOW I just upgraded to 390w in a 3.905 sq ft cabinet.
Area 51
Apache Tech
Astir
California Lightworks
FERO (if they still exist)
Hydroponics Hut (had these personally, dono what they're doing today..)
There's a lot of options, and good luck