Reid, my grow-it-every-year paste tomato has been Viva Italia for quite some time; if you aren't adverse to hybrids. It's always been very productive for me, and the tomatoes are good as salad tomatoes as well as for sauce and such.
Last year I tried San Marzano and San Marzano Redorta (I obtained both from the Piggy Swap on Cubits) and had good results with them, as well; the SM Redorta are HUGE and very solid. (both are OP)
If you want one more tomato site to take a look at, I ordered from TomatoFest last year for the first time and was very pleased with their service and the seeds I received.
