Fishbadger,
I use both the Airflo and Rio multi-tip lines. The Airflo has better loop to loop connections. They are smoother then the Rio. The Rio running line has less memory then the Airflo. Both come with four heads. A floater, intermediate, 3" per second and 6" per second head sink rates. If you are using a fast 8Wt, I would go with a 9wt line. If I remember right, both lines are in the $125.00 range. Cabela's sells a multi-tip system for around $89.00. They used to be $59.00 which was a deal, but they raised the price. Someone had mentioned to me that Airflo made the line for Cabela's and wanted them to raise their price to protect Airflo's price point on their lines. A buddy of mine bought one. It looked a little different then the Airflo I have, but he has been very happy with it.
The other option you have is to make your own running line out of a floater. You can then make your own heads out of whatever you want. Stuff like LC-13 or T-14, which sinks real quick.
Good Luck,
Brian