John I use a 100, 250, and 350, on my 7wt. I use 500 on the 10 and am considering getting a 600.
I like an integrated line myself. The tips on all of my lines are 30' and that means you'll be pulling the loop to loop into the guides on a multi tip. That bugs me and I think it affects my cast a little too so no I don't like multi tip lines.