The D605's are a great choice for the DRZ. I run 22psi front, 20 rear on pavement. 15 on gravel / dirt roads makes a huge difference in handling and 13 offroad grips surprisingly well for a 50/50 tires.
Hi, absolutely! Can't go wrong for the price. Longevity for the rear is not the greatest on the DR650, only got 3k kms(1900ish miles) out of it for mixed riding. Will definitely get the front again. Are you running a rim lock with 13psi?