Save your money -- those great albums don't translate to CD very well, imo. .....takes the life right out of them.
Never heard of the two bands you mentioned, but I'll check iTunes to find some examples.
Wilco is led by some former members of Uncle Tupelo, a central Illinois band that was instrumental in the alt-country movement in the 90s. Real instruments, and root-oriented music (country, blues, a little bluegrass, basic R&R, etc.) done in a slightly experimental vein. Good stuff, you ought to check them out.