S4 is a very good phone, fantastic display, best in the business by some distance.
Beware of some of the standard apps installed though, the text messenger app is dodgy as it will auto convert long texts into MMS which costs (plenty of options out there to use instead (e.g. Go SMS Pro)). Keyboard could be better (most cope with it) but Swiftkey is a good alternative.
Plenty of alternative email options to which support what you want.
I have disabled a lot of the pre- loaded apps, despite the warnings that my phone might throw a wobbly if I did (yeah, right) and, as you can imagine, the few texts I send are very short and to the point. Actually, since I posted, I am starting to develop a relationship with it. I don't like change, but it is, as you say, a very good phone for those that know how to use it properly.
My complaint about battery life turns out to be unjustified as well. You tend to 'play' a lot with new phones, thus running it down very quickly.
I had my S for about three and a half years, so I guess I am a bit set in my ways.