Norm, do you have a perferred method for starting seeds indoors?
Generally I don't start much inside, there are exceptions though. For instance I am now growing some Pomegranates from seed. The fruit was purchased last fall and the seeds should not dry so I was forced by circumstance to start over the winter.
I usually start in flats and pot the seedlings up after they are off to a good start. These are about ready to be moved to individual pots.
Some things I would never start indoors as there is nothing to be gained. The Sunflowers, for instance, are such strong growers that you may find the direct sown ones will surpass the potted ones before the season is over. I understand that you have other considerations though, one of those exceptions. Another exception for me would be Pepper plants, if I want to grow my own I must start inside as my season simply is not long enough otherwise.
Of late I have been concentrating on tree seeds for bonsai and I really feel that they get off to a better start outside. Any short term gain would end up meaning very little a few years down the road. Besides it's a lot easier outside, nature can do a much better job than I.
You may find that your seedlings become a bit leggy or elongated unless you are able to provide adequate lighting. I use 4 ft Fluorescent tubes, not ideal but the best I can manage.
As far as the peat pots go, as Opa noted these things are devoid of any nutrients. What I also find troublesome is that they have a tendency to stay wet and if you do allow them to dry they are difficult to re-wet. I like to set up a wet/dry cycle for most anything in a pot and these products make that difficult.