Don’t be confused in choosing themes, take my honest advice and go with Genesis Framework + any StudioPress theme.

Genesis Framework is the parent theme and StudioPress themes are child themes built especially for it, it is my #1 recommended theme framework because it is very well optimized, SEO friendly, secure, flexible, easy to update and light-weight to optimize website speed.

I am not affiliate with them but I honestly recommend it because I am using it on this site and it is one of my best decisions ever.