You should also check out X-Men Deadly Genesis, its a miniseries that just recently came out written by Ed Brubaker.
And when you're ready to get into other series... Captain America, Daredevil, Marvel Team Up, Runaways, Ultimate Spider-Man, The Ultimates, She-Hulk, and I'd really suggest Moon Knight, it's awesome.
When it comes to DC. Boy, if you're into DC at all it's a REALLY good time to jump on any of their characters right now. With the current "One Year Later" storyline going on most of the big time DC characters are all going back to basics, and it's good jumping on for any readers.
I'd highly reccommend Superman/Action Comics. Great stuff. And I hated Superman until this...so, that's saying a lot.
Batman is awesome.
And The Flash is rebooting at # 1. So that'd be a perfect jumping on point. This comes out in June.