just for show heifers, Naughty Pine. as far as being a productive cow? well, I don't know but it depends more on the dam than the sire. for steers, SS can throw some flat-out unstoppable calves but is inconsistent in their make up, but you probably won't get a flat muscled pud anytime soon. Naughty Pine steers will be prettier made i think, but you'll run into some pretty damn big birth weights.
we have 2 sun seeker cows, one has enough milk for a first calf, the other doesn't, but we knew what we were getting into. We've also had 4 NP calves in 2 years and 3/4 were over 100lbs and 2 of those were weighed at over 120. Unassisted though. really good calves.