I think the trade is pretty fair especially for similar condition machines. You might want to play MSF first to make sure you like it. When I had friends play MSF, it was split about 50/50 who enjoyed and who didn't care for it.
Always fun to change up the lineup......However, I would keep your RS especially if it is really nice as I think the value will be higher in the future on that versus the Taxi/MSF.
Good luck.