Should I switch from Verizon to ATT?

To understand why, I love technology. It is kind of a hobby of mine to stay up to date with the newest stuff. And I'm considering making the switch to ATT from Verizon for the following reasons:
1. Being on a GSM Network. I would like the opportunity to purchase unlocked phones, like the new Nexus 5 from google.
2. I can easily switch between an iPhone and android, which is a perk that greatly appeals to me.
3. ATT is known for faster speeds, despite less coverage than verizon (but not by much if I'm correct)
4. Verizon's customer support is *** and I'm getting fed up with it.

Currently I have an iPhone 5s and just upgraded my contract, and would have to sell it and use that revenue to pay my ETC of around 300 and my new phone(s). I know it is going to be expensive at first, but is it worth it?

I'm leaning yes, but I just want to hear another opinion.

I my self have verizon and i understand its a little expensive but hey you get what you pay for.ill give it to you on that i would rather have GSM rather than CDMA simply because changing phones is way better than having to call them to change your phone. But it depends on your use of data and other things.speeds change depending on your area. But yeah you should change to att so when you leave the county you simply unlock it and good to go no worry's about getting roaming charge