20 pullups is about good enough. That's more or less all I can do or care to do anyways. I usually to one pullups workout a week using strict form and I usually do a crossfit workout that involves kipping pullups during the week.
Lately I've been following a similar workout methodology to The Outlaw Way.
Basically they work on some sort of pure strength movement like squats, or an explosive Olympic style movement like clean and jerks followed by a short (8-10 mins) crossfit style wod.
They poop on long crossfit wods like Murph (1 mile run, 100 pullups, 200 pushups, 300 squats, 1 mile run).
I've been following this style of crossfit, if not the actual wods on thier site, for a month or so and I've seen some progress in strenght and overall musculature. I'm still 208lbs now but more ripped than ever. My overall conditioning hasn't really suffered as I've set personal records in 200 meter row and 100 burpees for time.
Anyways, keep up the good work. Hopefully Bells is motivated to stay lean and not on an upward swing seduced by the pizza.