lets see, unpopular opinion... Domestic "noble" hops are every bit as good as the classic german and czech nobles, and in my homebrewing experience they are usually better since they are fresher and in better condition.
Freshness, is the main thing that I think matters in almost all cases, grain, hops, etc. You have any favourite noble-style domestic hops? I recall really enjoying mt. hood once. Great hops, but there is always that temptation when making a continental style to get "the original hop"
Mt. Hood is wonderful. Like others have said in this thread, US goldings are great, and from what I understand alot of growers can barely given them away, so they are consistently available and they are not the hops that are left over after pros have gotten all the good stuff.
Crystal is another hop I like, although it doesnt seem similar to european nobles as much, it just has its own distinct flavor that works in alot of beers