Refurb units are awesome since they go through MORE testing than new units do. Refurb units are tested extensively to make sure they are functioning properly.
As far as software versions, My ONE XL which was refurbished came with the first version of NavCore 7 and came with Map 7.10. Refurbs most likely will come with an older version of map/software because they have had to sit at the factory due to the fixing process, which is a good thing for us 720 people.
Even if our units come with a newer version which doesn't include VR, I'm sure someone here would be nice enough to upload or share the VR speech files
I'm actually of thinking of also putting up my mother's 1 month old Magellan Maestro on ebay, and purchasing another 720. I REALLY love the Magellan but there's just an EXTREME lack of updates for the unit, and no mapshare. There's no way to customize anything. It's very basic. It gets you from point A to point B, and thats about it. It IS very good at it though. Has text to speech and all, but has a little 3.5 screen. My mom thinks it's a bit too small.