I made 3/429 once with Surrey against Middlesex, my overseas batsman Alam made 179 off 120, Vaughan also made 130 off 80. I then bowled them out for 130.
299 run win in county cricket is the best for me, in international I think I recall making over 500 against the Netherlands once with Australia and then bowling them out for about 80.
This was in ICC06 though, so might be easier or harder to make records with ICC III, not sure.