Combining Latin curricula

[Maria327]

I want to start Latin with my 5th grade son in the fall, and I'd love to hear from anyone who combines Latin programs for middle school kids, especially those who combine a grammar/translation curriculum with a reading/immersion one. How do you balance them, and what is the weekly work like? How do you pace the courses, and how much time is your child spending per day/week?

I myself used Artes Latinae in middle school, followed by Wheelock in high school and an online AP Latin class, and then majored in Latin and Greek (and English) in college. My mom has the old Artes Latinae books (but I'd want to find CD's to use instead of cassettes!), Wheelock text, guide, and workbook, Henle Book I, and Lingua Latina that she can give me. I bought all the components of First Form Latin a year ago, but now I'm not sure if I want to go that route (definitely not FFL by itself). At a used homeschool curriculum store, I picked up cheap copies of the Cambridge Unit 1 student text, the entire four-part Oxford program, Ecce Romani IA and 2A books plus the activity book, and Getting Started with Latin.

My son just started both Cambridge and GSWL because they were lying around, and now he's asking if he can do ALL the programs! They do all look great in their own way . . . 

I'm thinking about picking one of the reading programs to use as a spine, supplementing with Henle or Wheelock and using the stories in other two reading programs for extra reading since I have them . . .  I think I like the look of Cambridge a little better than Oxford, but I already have all of Oxford, and I don't have the Cambridge teacher's manual, workbook, or activity book. (I'm looking at them on Rainbow Resource and trying to tell myself it would be crazy to buy more Latin curriculum!)

Or maybe I should consider Wheelock or Henle the spine and supplement with the stories in one or more reading programs. 

Then there is my daughter going into third grade who now says she wants to learn Latin because her brother will. She picks things up quickly (she is a kid who taught herself to read) but also gets bored easily. She's very sanguine and likes things to be new and exciting all the time, but she doesn't mind a workbook style since she can usually zip through it. I'm thinking about GSWL followed by Ecce Romani for her. But, come to think of it, I also own the teacher's manuals for Latina Christiana I and II. I definitely don't want to combine her with her brother for Latin, since they are very competitive, and I wouldn't want to expect them to progress at the same speed.

Does anyone have suggestions?