I did my CPL with aeros and my FIC with Stapleford. They're both fantastic training organisations. I'd find it hard to choose between the two. Stapleford is a much busier school which has it's pros and cons.
I think it should just come down to personal preference. Go an visit both and make up your mind. At the end of the day either school will give you the tools to pass well and progress with your career.
Please feel free to drop me a line if you have any specific questions you think I can help with.