Quite a few forum members own Arendal subs and they all seem to be very pleased with their purchase. As advised check out the dedicated thread and ask the guys for some feedback. Also post the size of your room, budget and listening preferences and they will point you in the right direction.
I've had mine (sub2) for about 3 weeks now & it is absolutely amazing. I want to buy another one for the front but I'm going to need something more compact unfortunately for there.