Biggest thing for me is that the current 22" rims are only 9.5J with a 285/35 tyre. I've read somewhere that this size tyre is too wide for that rim. If I go for a wider rim 10j x 22, it'll be a big cost plus the new 22" tyres every 3-6 months. If I go for 21" inch rims I'd get a 10j which will take 295/35 tyres, these are cheaper to replace.
It unsettle me to think the 9.5J are too narrow for that tyre, I bought the car to carry my family. I'd rather invest in a correct width 21" rim than lay out even more for a new set of 22's.