Cool! "A must build tank for entry." I like that idea. We should start that here...
I liked the AFV Club's kit better than Academy's M10. It just seemed to go together better.
Don't misunderstand, the kits from both companies are very nice. Both have their own pros and cons and accuracy shortcomings.
Keep in mind that there are a couple versions from both manufacturers.
Academy has the M10A1 Achilles (British version) - kit # 1392, and the M10 GMC (Gun Motor Carriage) - kit # 1393.
AFV Club offers the M10 Tank Destroyer - kit # 3524, and the M10 Tank Destroyer Late Production - kit # 35s07.
There are also lots of AM items for each kit too. If you go
HERE, you can click the various links to see the kits themselves - some have review links - and to see all the extra goodies you can fill the kits up with.

PS: Welcome aboard Hazmat! Glad to have you here with us.