I just love sweet peas too. I couldn't grow them in ohio. It was too hot. Here in the Seattle area they grow well.
Florist types include the excellent nimbus and blue shift and they are both magnificent.
One handy tip from me regards germination which for me was always kind of a crap shoot until I started washing the seed with 1.5 percent hydrogen peroxide. They germinate immediately (within a week) if you do this. Just mix 3 percent hydrogen peroxide half and half with water.
I've tried this on other large seeds and it works really well. If you have good reliable germination without this trick I'd love to know your secret!