xylitol is the best, the birch variety. stevia is ok. I grew it last year in the garden, never developed a full real taste for it. It is quite sweet but doesn't compare to honey which my favorite. But it's on the shelf for days of honey outages.

splenda is a synthetic, best to avoid synthetic sugars, y'never know..

xylitol actually helps stop tooth decay, kills bacteria in your mouth.... enetrs the bacteria cell wall and destroys it. Neat stuff, a tad expensive if you use a lot, like for baking and stuff. It makes astounding good baked items though, the birch variety that is.