I can't decide what size wheels to get, ideas?

[chillware]

My truck is going to be lowered 4in up front and 6in out back w/ springs. I can't decide which size wheels I like the look of best.. I've seen a few pics around here but most dont have the tire size info so it's hard to know what people are running.

I'm thinking these combos right now.. If you have pics of any of these combos can you please post them and let me know the size of the wheels and tires? thanks!

20's in front and back
22's in back, 20's in front
20's in back, 18's in front

And then, should I go with a 40 or 45 series tire?

Thanks guys!