Currently have a bt hub 3 in the house, does grand bar it wont reach the bedroom for online gaming. used a simple signal booster but wifi can drop out from time to time, not good when your playin cod and your going for your 10th kill streak. lol. had the notion of getting a 2nd hub and putting it in the roofspace above the bedroom. I know there are bt hub 5's and a 7 but between a bt hub 3 and a 4 is there any difference in wifi connetivity? Or do i just assume the bt hub 4 is better then the 3 in every regard.. wifi dropping out is my issue.