Sounds like you have a good handle on the different providers that are out there. If you are considering cell phone based and want to keep costs down, check out Republic Wireless (based on the Sprint Network) or Straight Talk (Verizon, bought at Walmart for example). The thing I like about Republic Wireless is that they let you move your plan up and down. Wi-Fi only service is $5 a month. Unlimited Cell/Data/Text w/ WiFi is $25 a month. So, if you have a show, change your plan to $25 a month. If you don't have a show, drop it to $5 a month and use the unlimited calling/text vai Wi-Fi. This works well for some. Verizon has better coverage, but not enough better to warrant their crazy fees, so enter their prepaid service Straight Talk. Verizon 3G network, but only about $45 a month if I recall correctly. With that being said, I really like the Paypal reader.