Super long answer but This is very appropriate thread for me because I'm in a similar situation being in NYC and having no basement or dedicated game room. Having one pin in the corner of my living room looks kind of nice. I Could actually squeeze a second pin in but I'd have to Take all my stereo system/home theater gear off the rack and come up with another method to house them, and quite frankly having two pins in my living room I think diminishes the coolness of having something so exotic and fun in a living space.
So for me I feel one pin is best. I really thought that DI would fit the bill because it seemed like it would have a lot of variety but i wanted to wait and see what JJP4 looked like before pulling the trigger. I'm super glad i waited because pirates looks fantastic, and has so many options.
I did pick up a nice TAF as a first pin to hold me over since I knew it could be a while until jjp4 is available. Now of course I'm going to be sad to sell the TAF. Not sure why I ordered pinstadium lights to put in it just for the 6 months or so I own it.