I'm a big fan of multi-tip lines and use one on my 8-weight frequently. The main (floating) portion of the line is pretty similar to a standard weight forward floating line, only it is looped up front where a standard line would normally begin a front taper toward the leader. So, effectively, the main portion ends in the thicker, "belly" section of the head. This gives these lines by design the ability to turn over some pretty significant sink tips that a standard weight forward line with a front taper would have trouble with - the "awkward" casting feeling you mention. The tip set these lines include usually have a floating tip, an intermediate tip, a type 3 tip (3 inches per second), and a type 6 tip (6 ips), and the tips themselves are usually 15' long. Of course, one can make additional tips out of T-## material in whatever length and weight desired. I have used these lines very effectively for Shad out here and the 15' type 6 tip will get down quickly enough, though still not as quickly as a full sinking line. Of course, the longer it takes a line to get down, the more time there is between fish - i.e. fewer fish overall.
Multi-tip lines are great out of a small boat or kayak as well, since you can make major depth changes without ever un-stringing the rod or rigging multiple outfits. The kicker as it pertains to this thread though, is these are not budget lines. On average, a multi-tip line of good quality will retail anywhere from $110-$139 unless on closeout (which usually means the popular sizes are gone already). A cheaper alternative - make your own multi-tip line by cutting the front taper off of a standard floating line and build a new loop in it. Then, find, build, or purchase a 15' sinking tip or a package of T-material (T-8, T-11, T-14, etc.) and loop it up front. Then again, those on a budget are often less inclined to chop up their perfectly good floating line, so it's a bit of a catch 22.
Ultimately, I still believe a full sinking line is a vital piece of equipment for a lot more than Shad fishing on this river. I remember one year Trent Jones fished almost the entire season out here with a sinking line, for a very wide range of species. I know I use a sinking line or sinking tip system of one type or another for the majority of my Tidal Potomac fishing as well. Besides, most of our local shops do have less expensive full sinking alternatives for around $59. A lot of people spend that on drinks on a Friday night. Your local shops are also more than happy to switch lines out on your existing reel if you don't have or don't want to buy a spare spool or reel, and just hand you your floater on a storage spool until you're ready to put it back on.
Oh, and I remember the year of Dalton's "budget" sinking line. That line got shorter and shorter every time he went out. I know I built several loops on it as it did. I think we finally scrapped the thing once it was about 45' long, it must have had a core problem, or no core at all in some places. "Caveat emptor" as they say, factory "rejects" are rejected for a reason.
Dan Davala