Never had any problems with mine. Apparently they sorted the DI issue with more recent models, but if not you can always tame it with an in-line XLR attenuator, basically an XLR plug with resistors in it to cut the volume.
They do sound good and they are very loud, but that cab isn't very efficient (i.e. at converting watts to volume). They say in speaker design, you can pick any two from size, low-end extension and efficiency - and Orange designed this with the first two in mind. Still should be plenty loud enough for the majority of gigs though!