futurechelseawooley's Blue wedding

I know I have talked about vistaprint.com before, but I think that website is so awesome. Right now they have a deal to get 100 postcards free. All you have to pay for is shipping and if you add any extras. I want to use postcards for RSVP to save on stamps and what not. Well if I use vistaprint.com, It's going to be around $30 to get the 100 postcards (I only need around 75). They charge for adding your own pictures and shipping was around $10. I kept the back black and white to save on costs also. So what do y'all think? Since Jeff and I have been together so long, we have so many pictures of different "Big days" in our lives (prom, HS graduation, College graduation, etc.) so I wanted to make that a part of our wedding and I thought this was another cute way. However, I think I need to decide how I'm going to make my invitations before I order these just to make sure they match the invitation. I would hate my RSVPs to look better than my invitations. OR I could make this part of my invitation..... Any opinions?