I've been a fan of the X-men since they were revived so spectacularly in the 70's when writer Chris Claremont and artist (and later co-plotter) John Byrne (and let's not forget the outstanding contribution of Terry Austin on inks) took the title to new heights and set the X-Men on the path of global comics domination. Not only were the new characters vibrant (and mostly originally created by Len Wein and Dave Cockrum)but their interactions were dynamic, a dynamic which got better when Claremont & Byrne introduced the barely adolescent Kitty Pryde into the mix. Without this key character I'd argue that the title would never have achieved the heights it did.
And I suspect that writer Joss Whedon agrees with me because he opens the story with the arrival of Kitty Pryde at the X-Men's mansion. This Kitty is, however, no longer a gauche nervous teenager but a mature and confident young woman who is able to match wits with the acerbic co-leader Emma Frost (once the evil White Queen of the Hellfire Club -another Claremon/Byrne creation). The story also ends with Kitty though, if you haven't read either the comic or previous trade editions, I won't say why.
In between you get simply the best X-Men series since the heyday of Claremont & Byrne. Yes, it's that good.
Whedon -of Buffy, Angel, Firefly, etc- creates a story which contains everything you'd wish for: high adventure, betrayals, love, unexpected twists & turns, tragedy, humour, interstellar action, character development, which all turns on the fact that one of the X-Men has been predicted to destroy an alien world. The dialogue is wonderful, sharp, revealing and often very witty and is just a delight to read. Whedon is steeped in the X-men, slyly referencing scenes from the early days particularly when he has Kitty positioned so as to deliberately hark back to an iconic image of Wolverine.
And the art, oh the art. John Cassady is easily the best artist working in the mainstream superhero genre today. It is just gorgeous and Whedon knows when to cut back the dialogue to let Cassady do his thing. Laura Martin's contribution as colourist enhances the art to perfection which is not surprising as she is just the best currently working.
If you only buy one expensive-ish (currently a bargain for what you're getting) all-in-one omnibus this year -or ever!- then make it this one. With top writer, top artist & top colourist working on top form and in harmony, it's just the best example of why I still love superhero comics.