How to convince the wife? Any tips?
Is HIFI really only a male thing? No wives reading this forum pondering new upgrades and looking for tips to convince the husband?
There are probably plenty...
It's easier to ask for forgiveness than it is for permission!
OP, you could go Active, better value for money and significant box reduction and no need to convince her about expensive cables in the future. Less boxes = huge brownie points if your wife isn't as keen on quality music reproduction.
In future don't ask permission, just tell your wife you're buying new speakers. It's called leadership.
It's called suicide! 
jjbomber must be a divorce lawyer who is hoping to soon add to his list of unhappy clients. 
This thread is called "How to convince the wife? Any tips?" and I shouldn't really be on here at all, due to my lack of the vital ingredient, namely a wife. I guess about four occasional girlfriends don't really pass muster. However, since I am the undisputed master of my household, I currently have 38 loudspeakers (six of which are only the size of a man's hand, mind), spread over four rooms, with no wifely permission needed!

Is HIFI really only a male thing? No wives reading this forum pondering new upgrades and looking for tips to convince the husband?