If you do choose to go sinktip, there are quite a few options. Bass Pro and Cabela's have budget lines. If you can afford to spring for a high end one, of course, go for it.
That being said, putting together a fluorocarbon leader (see Lefty Kreh leader formula S) and tiny split shot in front of the fly, or a sinking fly, may just get you down where you need to be.
Hoping that the best and brightest will chime in here as well.
"have fun with this stuff"
in memory of Big Dale
RRhyne56, Flyfishing warden