camera advice

Hi

I've used a 5D, 5DII, a 1DS and a 1DMKIII for a variety of semi-professional work (boring product shots) but I'm looking at investing in some equipment for myself as my little boy has just started playing football.

So, requirements are something that can handle action photography (an area I need to learn as I'm a traditional static shooter) but also handle landscapes etc. Ideally full frame.

I was think about a used 1dsII? The 5DII I personnaly found it's focusing to be probelmatic.

Cheers
Vic