I heartily recommend american guinea hogs.
We've also raised berkshires and mangalitsas, and for our climate (wet and green in the winter, hot and arid in the summer), and our needs (we are an off the grid fledgling permaculture homestead with lots of beginner knowledge, enthusiasm and ignorance), the guinea hog has been our favorite. I think they are an excellent choice for a permaculture/homestead style farm for several reasons. Compared to berkshire (the american pink pig), their temperament is absolutely wonderful. Very friendly, and not escape artist-prone at all -- easy to shepherd from pasture to pasture with one strand of hotwire. They grow fat on pasture, and root for tubers and field
mice dens with zest! Their meat is second to none, and very easy to harvest yourself because of their size. You should prepare for lots of fat to render, and you should use it for everything! If you are worried about them being smaller in stature and therefore less meat, this is true, and to that, I say, raise more of them! Best of luck. Also, +1 on W. Jeffries info on rooting behavior being related to pasture management. Even the berkshire pigs we rescued from less-than-ideal conditions turned into ferocious plowing pigs when you get them on open land and good dirt. However, I will say this, those guinea hogs pack on the lbs like nothing else. Like the mangalitsas, they are old world LARD PIGS. Better get your pate and charcuterie chops ready!