Nexus: I had three of those. The 3310 (but who didn't?!), K750i and the Samsung Soul. As you said, the Soul was a superb phone, very well made and felt very solid, and looked great compared to most other Samsung sliders around at that time that weren't particularly attractive.
The only thing that let it down in my opinion was the software, the fluidity and 'polish' of the interface was rather lacking compared to the Sony Ericsson handsets I'd had before, and the OLED touch panel wasn't used nearly as well as it could have been.
Still got mine though, only old phone I do still have. My Mum has my Sony Ericssons!