Tamlin,
I don't know that I am a top grower I am just persistant. I won't consider myself top until I have all of them and with buntingiana not in circulation at all that couls be a while LOL. I do my best with them and it has taken time and effort to get where I have gotten. Some a beasts but all are very rewarding and I am just glad I can do my part.
Rattler,
Yes I am trying for seed. Swiped the last 3 nights and there is no polen left so fingers crossed. There is one more bloom too if I am unsuccessful but I really want to go for hybrid seed with that as my asplundii "Duida" will be open around the same time and that could make for an interesting cross. Right now all pure seed I make is spoken for by people experienced with this genera from seed and a TC guy I know.
Dewyleaves,
Rattler pretty much answered the question for you but FWIW I agree with all he said. It would definitly be easiest for you if you got alpina first. This plant is the most forgiving of all of them and will give you a chance to get your feet wet. After that you can look toward asplundii or the alpina x endresii hybrid. The next step up from there would be (in order of difficulty, based only on my experience) jamesoniana, praetermissa, endresii, unifolia, quelchii and lastly campbelliana. There are also a couple other hybrids out there, those can be expected to be as between their parents in terms of difficulty.