Hi Debbie,
Math is a bit of a political issue right now. My son used Trailblazers and I liked it - provided that he could have been radically accelerated it would have been very fun and useful. I am not sold on this "procedures bad, communication good" view of math. I think that procedures, communication, and memorization all have their place in Math. Where does this leave you?
My advice is to try some different approaches and see what works best for your son. Don't worry about what the experts are saying at this time, just "feel around" and you'll know when your child is engaged and learning. I really like experts in general, but it's important to recognise when a battle that doesn't really concern you is being fought, and to steer clear!
Best Wishes in all your endeavors!
Trinity