Advice needed on purchases to improve future homebrewing.

[DracoDei]

Ok, so the word "purchases" is a bit misleading.

Basically, I am making my Christmas list. I'm going to be putting D&D books on it, and I need to know what people recommend that I could play off of to improve my homebrewing.

I currently own:
(have access to the SRD, some of it in hardcopy)
Ebberon 3.5 (basic book)
Tome of Battle
The book with the Wu Jen, Warlock, and Warmage
The book with the Binder, Shadow Caster, and Truenamer
MM II
Other stuff I can't remember right now.

Stuff I'm considering:
Pathfinder PHB (easier to read than electronic copy, right?)
Book of Exalted Deeds (Mostly as an example of how NOT to do Good)
Magic of Incarnum(because, hey, new system)
Libre Mortis (My minor interest in anatomy has turned into some of my more popular work to date: The Organ Undead)

So, what would people like to see more homebrew of? For those who know my work(or are willing to slim through the links in my extended signature), what books do you think I could especially draw inspiration from that would fit my style?

[Xerlith]

Well, I'd go with Libris Mortis if you want to have more fun with undead stuff. The second best option would be MoI, because the subsystem is fun.