Help me out here. Books that I should and shouldn't buy.

[Moneyline]

You can definitely chop off a bunch of books from that list, and there are a few more that you should add. My recommendations are as follows:

For omaha 8: Get Super System 2 and High Low Split Poker For Advanced Players. Don't bother with Winning Omaha/8. The material in that book is tight/weak IMO and beginners strategy is covered better by the two other books. How To Win At Omaha High Low Poker is not a good book. It has a few useful bits of info in it, but it also contains so much bad info that you shouldn't read it until you are good enough at omaha to recognize what advice is good and what advice is bad.

For Stud: 7 Stud for Advanced Players is the only worthwhile book I've read, although there may be a decent book out there for small stakes games that I haven't read.

I haven't read any books on your list, so I don't feel qualified to comment. However, The Biggest Game in Town is a quick read and a great look into high stakes poker back in the days of Jack Strauss and Stu Unger.