i use stevia, agave and xylitol, xylitol tastes just like sugar but so expensive. agave is nice on pancakes and porridge, its just like golden syrup to me and very easy to buy. Birch xylitol is better than corn but harder to get here in the UK.
Stevia is probably the healthiest but it doesnt taste like sugar more like liquorice, its very economical, i use this mostly, i have a terrible sweet tooth.