Consumer Guide 2005 reports Trailblazer is most affordable of GM's midsize SUV's, matching most rivals for pace and space * Consumer Guide 2005 credits Trailblazer with good head/leg room in front and 2nd-row * Consumer Guide 2005 reports Trailblazer 60/40 split 2nd row converts easily and the 3rd row is more comfortable than most midsize SUV's *