Recently watched Hobo With A Shotgun. I bought the blu when it first came out and have watched it 3 times, I think. Its a good flic, but again, my usual problem with these modern exploitation movies is that they are more satire than real exploitation. Its entertaining but loses a lot of oomphf because its obvious the filmmakers are just having a laugh with the genre, more or less.
Bad Biology (2008) by Frank Henenlotter, who also did the excellent Frankenhooker (1990). Basket Case 2 was also 1990, but I haven't watched it yet. Henenlotter also does a kind of comedy/satire, but in a more original way that actually has something meaningful and funny to say. His films are without doubt pure exploitation.
Crank (2006) + Crank 2 High Voltage (2009) - crazy films that are sometimes too cheesy for me, but the bulk of the films just feel so different from everything else
Rampage (2009) Uwe Boll - if this isn't exploitation then I don't know what is...
Modus Operandi (2009) - I've only watched this once, back when it was first released, but I liked it very much then. I was afraid it would be super boring going in, but it actually kept me quite entertained the whole way, and the guy really just fucking nailed it with the look of the film. This was way more similar to watching an old exploitation flic than any other modern films I've seen trying to imitate the genre.
The Purge (2013) - a recent film that everyone seems to hate, constantly made fun of in mainstream media, but I saw it at the cinema and instantly recognized it as pure exploitation, properly done and reminded me very much of some older classics. People seem terribly hung up on how ridiculous the premise of the film is, which at this point is not something I even really pay much attention to.