Bridget,
I agree, having 2 or more sites is better, you can have all of them connected in some way but it helps to keep things clear and simple for potential clients.
Regarding your names, I guess it all depends on what type of VA services you are planning on offering, my preference would be to go with the My VA 2 Go. My only caveat with both names is it seems like it would "typical secretarial", or one off projects type of service that you would be offering. If this is the case, then you've hit the nail on the head! If not you might want to re-think the names. Also many people still aren't clear on the term VA, so that might be confusing to some people.
When I look to a name to use I try to find something that is all encompassing to what type of service I am offering or how it can benefit the potential client.
Redhead Business Management states that I offer a business management service, which is what I do.