Image, IDW, Boom and Dark Horse seem to be the best value to me at the moment, and even Dynamite seems to be revamping themselves a bit. DC is hit and miss, they have some very good quality like Superman Unchained for example was superb quality... and then stuff that's similar to Marvel.
Marvel's quality of entertainment/artists/stories are at the top but the quality of the actual product is at the lowest of the bottom, not to mention they charge the most for variants which is almost insulting since they're near the bottom of quality where better quality publishers gives a much more fair value [usually equal price of the main cover] for their variants, and some of those other publishers put the ads in the back to where they don't intrude on the comic unlike Marvel where there's ads poking you at every turn.
If any of these publishers started going with virgin cover art, i'd probably increase my spending budget by at least 60-100 dollars a month more. I don't know why they continue with all of that ghastly writing over the cover art instead of putting it on the inside.