So what's the budget and what prepaid carrier? I would assume you can switch if you need to. I'm not sure what the One V is going for right now (or what carriers have it), but the Nexus 4 is the best prepaid phone you can buy. Next to that would be a used Galaxy Nexus.
If you have to stick with a CDMA then the One V is a great choice, but Boost and Virgin also have their version of the Evo phones.
I can't remember for sure, but did any of the prepaids announce plans to carry a version of the One VX? If so that would also be a good choice, but my recommendation of the Nexii above still stands.