The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
You'll find use for that weight set-up, it has its place. Streamer flies for trout, smallmouth, pike, etc.
and disagree with Matt on 3 weights
and know plenty of skilled anglers who like the long 3 and 4 weights. The Cabela's CZN 10' 4 weight is a fine nymphing rod too.
I am newer to fly fishing.
preferably someone who uses the Lefty Kreh style