Halestorm is growing on me. Of the more modern bands, I'm getting really into Avenged Sevenfold. They remind me a lot of Metallica and GnR when they were rocking the 80s. Slipknot and Stone Sour, and Tool as well, but they're not exactly new band either.
Other bands seem to have a good song here and there, but don't have the consistency to do it again and again. Maybe Mudvayne.