Fishkisser-
I strongly sugjest taking a look at the Airflo Multi-tip Flyline. It is a bit more expensive than most flylines but that is because of its versatality. (around 90 dollars) It allows you to use just one spool but have different types of flyline through an interchangeable tip system (the front sections are something like 12 or 13 feet).
What you get when you buy it is a 90-100 foot main floating section. A floating tip section, a clear intermediate tip, a fast sink tip (Something like 3 inches per second) and a ultra fast sink tip(7inches per second). The line has loops made into it so you can change them very quickly. And it comes with a nice mesh line wallet for the tip sections. The line also has a 5 year no crack guarantee.
I was a little hesistant about buying the line myself because I was worried that the line might hinge or cast funny at the connections. I ended up buying the line and am very impressed! It cast very, very nicely and Ive mostly used it with the ultra fast sink line which would normaly be the hardest because of its weight( at least I think). All the other sections cast great also. If you decide to buy the Airflo line you will not be dissapointed at all, and you will save money by not having to buy two flylines and an extra spool.
Fun Fishin- Josh