To be honest I find coated strings on electric just horrifying, the elixirs always snaked - cause I have floyds on most of my guitars and that means the metal and the coating are forced to undergo sudden tension changes and the coating just snaps...
On acoustic I also don't really like them, I use something special ? so here's my recommendation -
http://www.deanmarkley.com/Strings/Acoustic/GoldPhosAc.shtml
Dean Markley make an acoustic string set called the Alchemy series, I personally love them, they have this warm rich sound with a nice breathy midrange. They perform miracles on guitar tone and they're not coated they're plated in some space age something or other that apparently gets used on satelites - don't care, bottom line is that they normally last me about 3x longer than normal strings and don't feel like a
condom mobile chat application, where all the intamacy is removed from contact ? Also I think they're about R20 cheaper than the Elixirs, Daddarios and Ernie Balls.
For electric they make this marvelous brand called Blue Steel:
http://www.deanmarkley.com/Strings/Electric/BlueSteelEl.shtml
They're really alive sounding and sustain like crazy, also harmonics pretty much just jump out of them ? They're put through a cryogenic freezing process which realigns the steel on a molecular level or something like that - I thought this was probably bullsh!t so I spoke to my dad, who's job is quality control at one of the biggest arms and ammunition making companies in S.A, and he said it's quite a common practice and that under a microscope at a billion times zoom (made up figure) you can actually see that the structure of the steel becomes smoother with less jagged protrusions running along it's surface. He also said that he'd imagine in terms of a musical instrument this would help by allowing the wave a more even surface to travel along which may translate to an improvement of certain tonal factors - though this was just his theory as he is not a musician and wouldn't claim expertise in the matter. I'd been warned that they're a pain to intonate but didn't really experience this at all, a quick setup with a TU-12 and my guitars have been great ever since. They're also quite a high tension which I like for playing fast (shredding or rhythm) as the string doesn't bounce back at you too much when you're trying to pick it.
I could sing their praises all day long - so I'm just gonna recommend if you've never given them a try it may just be worth the effort, especially if you play metal or fast lead - though I'd use them no matter the circumstances. Funny enough before Guthrie Govan got endorsed by Rotosound these were his strings of choice, like wise with Steve Vai (I think :?)
Now Dean Markley are making these new Helix HD strings that they're claiming are years beyond any other string:
http://www.deanmarkley.com/Strings/HelixHDStrings.shtml
I would explain but I don't care - just find what you like and stick with it ?