I'd probably be tempted to keep it, depending on what you get for a company car. If they give you something boring like a Camry or a Yaris, I'd keep it.
Whilst working as a contractor for StarTrack these days, I have my own van for work. Handy to have outside of work on occasion, but I'd still rather have something else as a fun drive or runabout for the weekend. Then again, I'm spending 12 hours a day in and out of a van, having something like the SRi is just what I need to escape the monotony of driving the one vehicle all day, every day.
But, it all comes down to your situation and your preference.