Oh we had GOS, Middle white x GOS, Lops, Saddlebacks, and now have our third (I think) set of OSB's - mainly because they are near and the breeder breeds really good pigs...
RE the pork -we have not found it tastes all that different. We had the odd one that had tougher chops, and we think that was more due to stress at slaughter time than feeding/breed/etc.
I would go for a breeder near you, and start with whatever they breed (traditional breed of course, but crosses are just as good fo pork as pure bred ones). Also you don't need registered pigs, indeed we always ask for the ones that don't quite make the breed standard - again no point of you thinking of breeding from them (or less likely).
I also think boys are better to start off with, by the time they get to 20odd weeks of age nearly 100kgs of pork trying to knock you over ... you will get fed up with them, and then they taste even better...