Fly fishing is my bag so I may be able to help you out. Ok, first what weight of flyline are you interested in? I know that fly~line is expensive but if you get what you need the first time then it's all worth it.
I use ORVIS WONDERLINE in a 5,6,8 & 9 weights ,weight forward sometimes a rocket taper. I see that SCIENTIFIC ANGLER has some decently priced line thats pretty good. You might wanna check that out. Try to stay away from that WalMart brand it's crap~ola. HOpe that helps you out some. If you have any questions feel free to email or PM me and we can get you all straightened out.