Thanks for all the suggestions. It feels solid like you are holding quality stuff. The keyboard is fantastic. I forgot how wonderful physical buttons are.
I did go ahead and make the even trade. Beforehand I did look around and even if I would have sold the Nexus to buy an Arrive, the difference was minimal. So I did an even trade and we're both happy with the swap.
The UI is snappy and there is no lag or hiccups. If there is, I don't notice them. My signal has been good so far. Haven't tried the Telenav yet. Connecting to Xbox Live was more pleasing than I had anticipated.
Bought Fruit Ninja and when I heard that achievement unlocked sound I just popped a big ol smile. Looking forward to Mango. I'll miss my Nexus and definitely will miss some of my Android apps, but I'd trade all over again in a heart beat. This is a sweet phone.
Also, the Nexus' Super AMOLED display is the best and will definitely miss that. The Arrive's LCD is decent though and I'll get used to it.