Eric, I happened to get both of these books using a Borders gift card given to me a couple months back. Haven't read either one, but heard lots of positive things about both. Please let us know what you think of them.
I just finished The White Tiger. It is a real page-turner! I didn't quite read it in one sitting, but maybe three. It's really interesting, has lots of local color (the detail this writer goes into about the lives of the poor servant class in India!), and is written with a kind of sardonic wit. It is also kind of Bizarro-world version of Crime and Punishment, which is made apparent about 15-20 pages in, but I don't want to go into detail here. At the same time, I don't think I would read it more than once. It's got one thing to say, says it brightly/sharply, and then slinks off. Maybe it would benefit from repeated readings, but I don't think so. It is more of a surface-type book.
The Bolano looks like one you might want to read more than once (if anyone had the time of course). Far more consciously literary, has more depth, etc. I will be able to start this one more seriously later next week.
I'm more than half-way through 2666 (approx. 900 pages total). It's well worth it IMHO.