Tomatoes: Potting Up

Since I planted my tomatoes so early this year I had to transplant them into the largest peat pots I could find. Lowes had some that didn't have a size noted on them, but they look to be about the size of my 2-cup measuring cup. Made by Ferry-Morse. An 8 pack was around $2.20. This will be their last transition until they are ready to be hardened off and planted outside next month. I removed some of the peat from their original 3" pots while transplanting to give the roots free access to spread. In sections where root penetrated the peat, I left it alone and planted as is. I know peat pots are supposed to decompose eventually, but I don't want anything impeding their growth if it can be avoided.