Verizon Options

Tomorrow I (finally) hit my upgrade date with Verizon. I'm planning on switching from an iPhone 4 to one of the Android options that Verizon offers, but I'm a bit perplexed as to which device to go for... To be quite honest, form factor/manufacturer don't really matter much to me. My number one priority is that the device stay relevant as long as possible. Would it be a better idea to choose a phone and upgrade now or should I wait into the next few months when more options are revealed?