I think it would be perfect in your space M8.. around 2.5ft square your space is yea? I think that's the space its recommended for by platinum.. you can get all details on their site. It would absolutely do 2 plants from other p300 grows I've seen on AFN.. not sure you would get 2 plants in that space though cuz the platinums seem to grow em big!!
weah well growing two plants at a time is just a thought but im thinking probably more just continuing to grow 1 at a time and going back to 3 gallon pot instead of 1 gallon. which would make for larger plant to begin with. im guessing even a p150 would be better then my current viparspectra v300? so i suppose that could also be a budget potion? but im guessing the p2300 would be my best option?