It's an Insider-only piece, so we won't pull much from it (respecting the pay site, such as it is), but Keith Law says the Astros have the top farm system in baseball. A quick nugget:
The Astros have done everything they needed to do to restock what was a few years ago the worst system in the majors...It's been ugly, Astros fans, but hang in there.
The Top Ten:
1) Houston
2) Minnesota
3) Pittsburgh
4) Chicago Cubs
5) Boston
6) New York Mets
7) Kansas City
8) Colorado
9) San Diego
10) Baltimore
And the rest of the AL West?
13) Texas
21) Seattle
26) Oakland
29) Anaheim