ONLY 3? lol, I have 4 strollers. My DH thought I was crazy too, but now I think he sees why I need them all.

I have:

Bob Revolution- I use this for almost everything in general. I have the car seat adaptor for my bucket.
Graco Quattro Tour- I don't need this one, but I could only get the pattern car seat I wanted with the travel system, so I keep it in the garage for quick trips around the block and to our community pool.
Graco Snap and Go- This is the stroller frame we used for our graco bucket seat. Great for travel and when they are tiny.
MaClaren Volo- This is my umbrella stroller that stays in the car and the one we usually take on the plane.

I'm curious why you don't just use the regular seat attachment on your Vigor? Not, that I'm suggesting that you shouldn't own one more ;-) I just really like the vigor with the toddler seat in it. Maybe I'm thinking of a different stroller?

Tell your DH there are other crazies out there like me who already have 4 and once we have a 2nd kids we shall own 2 more a BOB double and a MaClaren double!!!!