I like to keep the air temp at about 90*-100* for peppers and 80*-90* for tomatoes. That's air temp and I think soil temp is 5-10* less. I will often get germination in 3-5 days for tomatoes and 5-10 days for hot peppers. Here is a page at my web site that shows how I do it.
http://knapps-fresh-vegies.netfirms....enhouse06.html
Carol