Yeah, the K750i should be a nice phone
My phone is a Nokia 6230i.
It's fairly similar to the K750i, but not quite as good in some respects. But it was slightly older and cheaper, and more importantly it's a Nokia - I've gotten to the point where a phone is just something I want to use, and I used to have a Nokia 8250 and didn't want to particularly get used to the Sony interfaces.