Sean-
Take a Reign around while you are at Cycle Works. I ride an 07 Reign 0, and it is such a go-anywhere bike. At 30 pounds it's kind of a welterweight; a little heavy in the XC perspective, a little light on the DH side. However, I ride around Kittatinny, Allamuchy etc. with few issues. The suspension is so well crafted, uphills feel like I am on a hardtail but downhills are fearlessly fast.
I know you got into some issues with Diablo, but if these are replacements for the Sunday, I can attest that the Reign holds up impressively well on the mountain if you get back up there. Despite having an air shock in the rear, it has taken some good drops and a hell of a lot of abuse on the rock gardens.
I can't say enough good things about the bike. The stock tires are garbage and you are better off with a chain guide and bash ring (I never found myself in the high and low gears anyway), but it is WELL worth the money.
Let me know if you want any specific info.