Marshall JCM 800 greenback with?

Hi got an jcm800 2204, I already have 4 greenback g12m and want to add another 4 speaker. 

Should I go with the greenback for the upper cab and go with reaper for the bottom cab, or g12-65?

I'm playing rock, blues... Hendrix, slash, CCR, the who, canned heat, santana.. those are my main sound looking caractere

Can you help me with these?... Sometimes this cab will be hooked up to with an mesa boogie mkIIc for more metallica, megadeth, stuff..

Thanks again