DE-THC ,
What kind of space and $$$ are you working with? I think the amount of space you have for a grow room should factor into how large you go with your light. If you get a 250 or 400 and have the space for a 600 or 1000, you'll wish you went with the larger light in the end. (In my humble opinion, of course)
I had the room and started with a 1000 watter and I'm glad I did. My first grow was in organic soil. I used Tick's super soil recipe and grew some organic dank! The hardest part was mixing the soil in the beginning. After that, all I did was water every few days. Easy as pie!!
Next I tried recirculating DWC buckets. This provided some of the fastest and most amazing growth I've seen. But you have to stay on top of the rez temps or you'll get hit with root rot. I got tired of putting frozen water bottles in my rez, and didn't want to spend the coin on a chiller. I also didn't have enough juice running to the room to run all those electrical items and wasn't willing to get an electrician to run more amps to the room. While I had two great grows in DWC, my room wasn't the best for changing out the rez and checking airstones every few days. It was too much of a pain in the ass...too much work for me (I know...I'm a lazy bastard :evilgrin).
I've tried LC's soilless mix and fed with liquid ferts with organic guano teas...the liquid ferts worked well and grew some nice plants but just wasn’t my cup of tea. The organic guano teas were just too much work for this mofo,,,lol!
And now, I'm doing coco drain to waste. With my drip manifold (thanks to PICO), after the first three weeks of flower, I just sit back and watch the ladies. I usually top off the rez every 5-6 days. I've also ran coco and hand fed. Depending on the number of plants and the amount of time you have on your hand, that’s not too bad either.
So, depending the style of growing you’re interested in, there a wide range of options
This hobby can get expensive if you are like me, and have to sample a few before settling on something you prefer. I'm really diggin' the coco DTW so hopefully I'm done buying equipment!! :headbang
Good luck with your choice!!
Grow Safe
SDC