If you're on a budget, I'd recommend a Challenge Fango, or if you could find a cheap Dugast Rhino or Typhoon, they're definitely worth the extra couple of bucks. Quality tires are the best place on your cross bike to spend your money.
I raced my Fango for the first time Sunday. The difference in grip while turning was confidence-inspiring on the dry, grassy course. Much mo bettah than the Grifo that was my front tire of choice.
I'd live to try a Clement PDX. I hear good things about them as a front tire.
AFA the OP: The Grifo/Fango combo is very hard to beat in lots of conditions.
My training/backup wheelset was an FMB SSC on the rear and a Grifo on the front. The SSC died (sliced thru the tread), so I'm looking to replace that with something. The racing wheelset is a Conti 'Mud' (aka Grifo 2) tread and a Fango. The Conti 'mud' does OK. Slides consistently and predictably when you hit softer stuff but really likes it drier.
I have a Tufo Dry 32 on the rear of the backup backup rear wheel, but I haven't ridden it yet.
If you want durability above all else, see if you can't find a Tufo T-series tire. I have had several in the past. Wear like iron. Don't flat (often). Problem is... they ride like poo.