good brushless setup advice

[secondwaiting]

hmm now i don't know... i'm moving to arizona next year so i'll be driving where it's hot, so the quark/neu combination sounds kinda good. and so do 30 minute run times, but i'm perfectly fine of doing 15 or 20 if that makes my motor last longer and not overheat... and how important is weight when it comes to breaking parts? i keep busting plastic bulkheads when i jump and i dont want to buy any more alluminum, so what do you suggest...8000s for longer run times or 5000s to save weight, and just get like 2 sets of batteries? and is the neu/quark pretty much what i have to do for arizona weather so it doesnt overheat? does that need a fan too?