i mostly use the scientific anglers tapered leaders with the loop, very easy and fast connection when you have a loop on the fly line as well
and yes, fly fishing can be addictive, you're always searching for that magic fly, but truth be told, you don't NEED more than 2 rods in you your arsenal, 5-6 wt for trout, and an 8wt for windy days, and larger fish, such as bigger bow, pike, salmon, muskie, anything else is just a want