The way I see it is there are pros and cons to both DE and SE razor's.
The DE razors win out for me because there are countless DE blades for a shaver to choose from, you are bound to find the right blade that works well in any given DE razor and is suited to your skin type.
It's true that DE blades are not as thick as SE blades but a good DE razor will clamp the blade in such a way that there is no blade flex or chatter so it doesn't matter that it's not as thick as a SE blade.
Generally DE blades are a fraction of the price of SE blades so the fact that they don't last as long as SE blades is not an issue to be worried about.
I've owned injector razor's, and very good they are too but there is only a hand full of blades you can use in them so a very limited choice of blade.
I've owned AC type SE razor's and again there is only a handful of blades that you can use, so again a very limited choice of blade.
I've also owned the SE razor's that use the Gem type blade and a couple of others, the same deal here again, a very limited choice of blades to use, so if your skin does not get along with them you are pretty much stuck!
I've gone full circle from using DE razors to using every type of SE razor from injector to Gem type and on to AC blades razors and now I'm back to DE Razors and a few Straight razors and I think this is where I'm going to stay but I had a lot of fun owning and using all those other SE razor's and you should try them too because there is no "Best razor type" only the one that works for you, that can be one or all of them!
Have fun finding out what's best for you, I did!
Paul.