You could change launchers on any android phone as far as I know.
For instance, you can access the music player even while the screen is locked.
As I understand things, there's a strained relationship between Samsung and Google right now.
SenseUI on my HTC phone isn't horrible, but I can't stand Touchwiz. The Samsung versions of applications seem horribly unpolished to me.
. I'm currently leaning towards yesterday's announcement for the (Samsung) Google Galaxy Nexus phone which will be the first to showcase ICS (or Android 4.0). It's not perfect in every regard, but it has a lot that I would like. I really like the specs on the display and also from what I've read, it's a very smooth-operating phone.
As to overall performance, we saw a good deal of stutter in the Galaxy Nexus before us. Taps were not always recognized and there were occasional delays in performing an instruction, though in Google’s defense, it was a phone fully loaded with running tasks and the software is being continually improved and optimized (i.e. it’s not yet fully baked). That having been said, it unfortunately remains the case that Android isn’t as swift and responsive as iOS or Windows Phone (or even MeeGo Harmattan on the N9). Or at least it wasn’t on the demo phone we got a look at. The subtle, pervasive lag that has characterized the Android UI since it inception is still there, which is not a heartening thing to hear when you’re talking about a super-powered dual-core device like the Galaxy Nexus.
Why is that line of text crammed all up on the left side?
These guys didn't seem to think it was so smooth.
http://thisismynext.com/2011/10/18/galaxy-nexus-android-ice-cream-sandwich-pictures-video-hands-on/
I was unsure about a 4.3" screen when I got my Evo. I knew I wanted as much real estate as I could get, but I thought perhaps it might be awkward to hold or put it in my pocket. It's not. It's fine. 5" screens would probably also be just fine. 7", the size of my Galaxy Tablet, yeah, that's too much for a phone. But north of 4" is fine for sure.