I realize norcal925 that you requested opinions regaurding the Goodyear Wrangler vs the Falken Wildpeak, however, I thought it may be helpful to leave my review of the Hankook Dynapro M/T's incase you do decide to go with a good less-expensive "mud" tire.
I've had them since July and have been blown away time after time with what they can do and from what I've observed.
1. The tighter tread pack - rides great on the freeway! It didn't have the whir-whir-whir sound that I was expecting from a mud tire. A slight increase in noise than the Firestone A/T's I had previously, but a close comparison none the less. Cornering, stopping, and daily driving have not changed a bit from the A/T to the Hankooks. The tight tread has also kept the gas mileage pretty much the same - no difference has been noticed at the pump. I've put 6,000 miles on them and rotated/balanced only once and there is still no difference in the tread depth. They seem to stay cool and wear well!
2. Handles 4 wheel driving like a boss! No loss of traction, no tail wagging around corners, and allows for a great pavement like ride when bombing down long dirt roads. I can crawl in 4 Low up slopes that simply blew my mind! So steep in fact, that trapped water in the drain tray (located within the little holes in between the hood and windshield) ran out onto the windshield and then off both sides of the vehicle! Due to the soft compound the tire is made out of I have yet to air down while doing serious rock crawling.
3. Come rain, snow, or mud they continue to dig and shed to firm ground providing remarkable handling in incliment weather. We got 16" of snow last weekend. Saturday evening, during the storm, a buddy and I went off roading to test the tires in snow. Unbelievable! It wasn't until a steep icy snowy muddy section that I had to put it in 4 wheel drive. Even then, I can't believe we didn't get stuck. They are rated for mud, and perform well in mud, but my word did they do great in the snow!
4. The last piece of the puzzle would be the price (I have a 2.5" lift and bought 31's). I looked at 11 mud tires (lets be honest, being my first set I really wanted the coolest looking ones) and got quotes on 6. They were $75 cheaper a tire than the toyo's I was quoted on and $25 cheaper a tire than the Goodyear Wranglers I was quoted (almost bought the Goodyears). The Hankook's have a chevron pattern with real deep lugs and a nice tight tread pack. Between the look and the price I got the Hankooks.
Ironically about 2 weeks ago a friend of mine sent me this review he found while looking for mud tires and it kinda reinforced what I had experience with my set. It is a reveiw by fourwheeler.com. They put the top rated mud tires head to head in a 2 mile loop at Hollister Hills. To see how the Hankooks held up against the competition use the first link:
http://www.fourwheeler.com/techarticles/wheels/129_1104_mud_tire_shootout_first_place_hankook_dynapro_mt/
To see the results of the competitors and how the Top Ten shaped up click this link and scroll down about 1 page:
http://www.fourwheeler.com/techarticles/35/wheels/
Simply put norcal925, if you do decide to make the leap to a mud tire this is the one I would recommend. I like them and I think you would probably enjoy them too.
If anyone would like to see a laugh-able video I made showing how the tires handle somewhat loose and sandy terrain just click the link below.
http://www.youtube.com/watch?v=AZk4RK4U-S0