Motorola Droid X : Upgrade To 2.2 - Doesn't Seem To Hold A 3g Signal - Consantly Missings Emails

I have been having a lot of problems with my DX. Verizon told me that some of my issues would be solved if my phone were pre-loaded with 2.2 instead of having a phone that was upgraded from 2.1 to 2.2. So they sent me a new phone and told me that it would be pre-loaded with 2.2. When the phone arrived, it had 2.1 on it.

Do I keep the new phone and use it with 2.1? Do I keep the new phone and ugrade it to 2.2 to see if it's better than my old phone. Do I keep my old phone?

If you could do it all over again, would you upgrade to 2.2?

If you are interested, my problem 2 biggest problems are:

1) My phone doesn't seem to hold a 3g signal. It regularly drops from 3g to 1x and back to 3g. The phone goes 4 bars to 1 bar and back again.

2) My phone consantly missings emails. You can see the emails in my inbox if I go through a brower, but the email app doesn't show them no matter how many times I refresh.