I have both, I've been using nxtl for about 1.6 years, got vzn in april 06 (7130e).
Just recently I bought a 7250 (from a bbforums reader).
Love the 7250,so switched bes over to verizon 7250,( 7130 is de-activated and sitting in my drawer, should I sell it or what?).
Prefer the nxtl 7520, I prefer the added weight, makes it easier to type, plus the nxtl has the speaker which gives me something to hold on to, as opposed to slipping out of my hands.
I'm still adjusting to the 7250. Like you verzion had a better price point when bundled with laptop access (evdo)& voice.
I prefer nextel voice on iden("warmer" sound, more natural then cdma).
If you need to know more, ask, and I'll post more later.