People seem to have luck with Marshydro, Cobshop makes a good product. We have a pretty good DIY section here too. Difference between a quality light and one that's not is going to directly impact weight and quality of your end product. A good rule of thumb for lighting... if you can buy it on Amazon, it's not what you need.
Nice thing about COBshop is they're individual 50 or 60w lights, you can start with a couple and add a few more later. Kinda what I did, I started with a 200w build, and then added another 250w a little later on.
I would also suggest weighing this in as well when buying a light...
If it takes you 2 runs to hit the same quantity, but still never get to the same quality, then your not really saving money with a cheaper light.
As to filters and fans, I'm probably not the one to ask, am in a legal area and my tent door is open 99% of the time... and I don't think I've run my extraction fan in about 6 months.