Thank you all for your answers, and Calming Tea, your post was like a cup of tea (which I happen to be drinking right now)!
When I bought his handwriting curriculum this year I purchased A Reason for Handwriting transition so I'm set for cursive. I will look at Sequential Spelling. Is PLL Primary Language Lessons?
I *thought* I had decided on The Complete Writing Program for both boys until it hit me that our youngest son's dislike of writing may stem from dysgraphia. Some other curriculums I'm considering are: Character Quality Language Arts; Daily 6-Trait Writing; Winning With Writing; and Write With the Best. I think it makes sense to hold off on a true writing curriculum for our 8 year old, but I need to help our 11 year old begin to polish his writing.