'Best value' can mean a multitude of things though. Obviously, in year 1, you would weigh up all the pros and cons of each system and choose whichever suits your needs at a price you can afford. Subsequent years would be more of a decision as to whether your current system still fulfills your needs, whether there has been a price hike and whether moving to another system is faesable (in terms of time, training and money).
I suppose what I'm really saying is to make the right decision first time around with a view to what it can offer you in the future.

