Looking good there
If you can not afford something in the range of a P300 Platinum LED, or a BudMaster new generation, then go for HPS/MH if you can handle the heat. Use a cooling hood for the HPS/MH, else you will get heat issues in such a small tent. I would opt for a 400W HPS/MH in a 4x4 I think.
I bought a second generation LED tho, second hand .. full spectrum, you can see what it does in my current journal, big tent .. it's a 4x4
It's looking good I think, but I do not think one can compare it to a HPS/MH. The newest generations LED's, are better. They are also expensive. PAR rating is what is important here. Photo Active Radiation. A full spectrum LED panel, will have a much higher PAR rating then a HPS or a MH. But the light intensity of the later is much higher, as is light penetration.
With LED's you should consider a SCROG or at least LST to get as much light on the lower nodes as possible, or set up side lighting. LED is cheaper in operating, and produces very little heat.
I have no experience with the MARS LED's .. I can not advice you on it.
Also, your bold and way to large red letters, are hurting my eyes.