If you have time and want best bang for buck, go straight to the source. Most of the small hydroponic places you order this lights from Alibaba.com and put their own brand stickers on it and jack up the prices. I know for a fact lighthouse hydro does that with their "Blackstar" LEDs...
For S & G, I contacted a LED supplier on Alibaba and got a price list, cheapest light on the list I put the specs below. I also picked the option to have Alibaba go and get quotes themselves. I recieved other quotes but have mot looked at them in depth, but I bet you could also haggle and get the below for about $200 flat:
$245
Input Voltage:AC100-240V
Rate Power: 185~200W
Power factor:≥0.9
Fixture Size: 504mm*254mm*50mm
2nd Lens: 1 2 0 °(60°,90° optional)
Material: Iron
LED Type: 100pcs*3 watt LED(4 Channels with Remote)
N.W(KGS): 5.68KG(Light fixture) +1.26KG(Power Supply)
Color ratio
R(660nm):R(630nm):B(455nm):CW(12000K):W(6000K):UV(410nm):IR(850nm)=
30:32:16:12:6:2:2
It has 4 mode which you can have custom programmed by the manufacture. They come with preset Veg, flower, crop, and DiY modes but if you wanted lets say more red in flower mode they can make custom spectrum. Also it seems the new thing is to put WiFi on the led lights so you can change the mode via remote, that is already built into this light. All pieces have 3 year warranty, and if you pay with the escrow option they supplier doesn't actually get paid until you have a working LED light in hand.
When I upgrade to LED I am going straight to China via Alibaba