Alaina, I honestly think either one is a fine choice and there are lots of branding/marketing options with each.
Which one resonates more with you?? (and remember, you can always let the other domain go at the end of the year if you decide not to use it)
Personally, I like
Alaina the VA
(If I HAD to choose one...) - it's short and to the point, plus it's got a nice personal touch/tone to it which can be so hard to find in the online presentation of a virtual practice.