I'm a bit late to this party. But I've read that blending whole tomatoes with skin and seeds makes the most of their nutrition. This book was very intersting
http://www.barnesandnoble.com/...
I don't think straining would take away SOLUBLE nutrients ..just insoluble ones
My kids love the Ninja blender so I got the one with a large pitcher and a small cup. Better than a standard blender. You can put big chunks in and still get good blend.
and I have Celebrity and Early Girl too, waiting for them to start. Also Mortgage Lifter and Cherokee Purple. 2 plants each. Celebrity and CP have been some of my most tasty ones, but I've grown the others too. I was really happy that the nursery had all of them.