The amount of variability with transplants is, of course huge. I am really interested to see how this comes out but I hope folks give a lot of detail in their method. Good tomato transplants require full sun, should have bottom heat for fast germination and to stimulate root growth. The seeding mix should be well aerated and have good moisture retention. Pot size should be matched to the length of time that the plant will be growing before transplanting out so that roots are developed enough to hold together the potting mix at time of transplant but not to the point becoming root bound. Watering should be even so that the plants are not stressed by wilt. Good temperatures for tomatoes are in the 80's F day and 60's F night. Plants should be hardened off in a coldframe for a few days to a week before transplant. Once transplanted in, with as little root disturbance as possible, they should be watered in with a nutrient tea. The reason people started using transplants was to optimize the growing environment to get an earlier start or to prevent the loss of precious seeds. If someone's situation makes it difficult to produce a good healthy transplant then it is unlikely to out perform the direct seeded one. People with long growing seasons have a lot more room for variable conditions. In our short season we need season extension on both ends most years to get a decent crop of tomatoes and a lot of people now grow them in high tunnels for the whole season. It's actually a lot less work for me to raise a transplant in my greenhouse then it would be to be protecting the direct seeded one on a 20 degree F night in May. Tomatoes are some of the easiest things to transplant, luckily since they produce adventitious roots. Cucurbits are a whole different story. They really suffer from any root disturbance so I either direct seed if they don't need a long season, like pumpkins or squash, or seed into jiffy 7's if the seed is super expensive, or needs a little longer season, like melons. Happy growing everyone. Most of our snow is gone other then the shady spots now and I can hardly wait to see some green tree buds.