hello. my name is joao pedro, i´m portuguese, and me and some friends are planning a road trip in the USA for about 20 days, in early october. we want to go from the east to the west coast of the u.s., but we are not sure about the road(s) yet.
based on the "roadtripusa" site, we are divided between the US-50 from new york to san francisco (and in the way maybe going to vegas, grand canyon and los angeles), or the road 66 (driving from new york to chicago, and then catching the road 66 to L.A., and on the way to the grand canyon and vegas too), and then ending in san francisco.
-the thing is, wich one of this 2 options looks better for u?
-wich one has, in your opinion, better countryside views?
-do you think 20 days are enough, with 2/3 days in each big city?
-wich one do you think has better atractions in the way, like small cities, monuments, natural parks...?

if someone could help me, (since its your mother country:) ), i woul be thankful!!!