I used Red Bear Tortis picks for several years when the real tortoise shell picks dried up. They sound very close to the real deal and I still recommend them for acoustic guitar. Nice picks, but about $20.00/each.
I started using the large triangular "Light" V Pick several months ago when I misplaced my Tortis pick and I think I found a pick that works very well for me for a lot less money.
Be aware if ordering online that the "light gauge" V Pick's flex is more like a Fender Extra Heavy so there isn't much give there, but the tone is nice and fat.
The V Picks develop a nice grip when your fingers begin to warm up so that your hand can stay more relaxed, have great tone, and just the right amount of "string grab" for my tastes.
Still not cheap at $4.00/each, but I'm still using the one I bought about 6 months ago.
I'd also like to try a Blue Chip, but when something's working as well as the V Pick I figure why bother.