I'm a big fan of Fermentis. I used to use the Danstar sometimes because of the price. Now Fermentis is usually cheaper. T-58 and S-33 are $1.75 at Rebel Brewer, and $2.25 at my (sort of local) HBS. S-04 and US-05 are $2.95 at Rebel and $3.95 at my HBS, the same price as their Danstar yeasts.
Danstar is definitely creeping up on the price-point where you might as well just buy liquid yeast.