My son is finishing up CLE 6 Math and has done fairly well with it. However, we're wanting a one year pre-alg course and CLE has pre-algebra in both grades 7 and 8 (although accelerating through the two is an option, I'd rather go with a one-year course.) I also like the idea of having the videos available if he needs them as well as the focus on mastery with a decent amount of review.
Could he go directly from CLE 6 to BJU's pre-algebra? It's so hard to tell from the samples. BJU's course is targeted to 8th grade and there is no placement test. The 7th grade course is a comprehensive review of arithmetic.