Well, to me it doesn't make that much of a difference, you will see benefits of the new gpu now, so I think I would go with that. Also look at the 7870, it's the same price and is as strong as a 660ti.
It was always stronger, there is not one review for the 660 that I have seen that puts it above the 7870, it is always evenly between the two of them. There are weird things called converters from mini displays. The 7870 comes with one I am pretty sure or you could get one for almost no money. Also that quote means literally nothing without context. For all I know that could be a quote saying "Barrack Obama is Way more powerful than Joe Biden" With no context, quotes mean nothing. Also, I usually try to losen up people to the idea that an amd card is better. When someone is going to get a $560, and I tell them the could get a $430 card that is more powerful and will overclock more, they might not believe it. So yes look at any benchmark and the 7870 will be placed higher. Also, every nvidia card I have had has had problems, I would still be will to buy one from them if it was better. But in the end trying to insult me doesn't really matter, because you are the one ending up with a poor system for the money.