I like Wagner's attitude ( you get it when you get it ) in my layman's opinion it's one of the best engineered reels made, I think the no3 is the second batch he has made over a five year period.
The whole reel is aesthetically pleasing and what skill he must have, Amazing.
I would think an Skagit line 400/ 425 would be about right.
You can cut it back ( thick end ) to find the best weight for your rod.
I prefer one piece lines myself a good choice would be the Barrio range, ( switch & scandi ).
The Sage Trout LL mentioned by cgaines10 is a river Trout rod medium action, not a small lake/loch rod.
The igniter you might find to stiff, a rod that will give you a combination of feel and power would be a
Scott Radian 9' x 5 which is actually a five and a half.
First get a book on casting by Lefty Kreh second by an 8' or 8'6'' x 4/5.
Because it's easy to cast compared to an 8wt.
If you buy maxcrap you end up with maxcrap.
You can find a good enough rod second hand for fifty pounds if you ring around the dealers.