The Simms Freestone is the way too go as I am on my second pair. The first pair lasted 4 years and actually still good but had to get a smaller size for the wetsuit vs waders. The new Freestone I just got seems to be built better for ocean/ rock fishing with new rubber coating on the toe-box area vs just leather on the old style which gets chewed up on fishing the roclks . As far as spikes...I looked at wear-bars but found this site called gripstud.com and the customer service was excellent. Although they make studs mostly for dirtbikes etc they have had a bunch of fisherman call and order their studs for wading boots. I choose the #1500 stud and I tell you the traction is great,much,much better than my old korkers and simms hardbites. Kinda wish I went with the #1800 which are a little longer for the bubble-weed etc,but the #1500 are pretty good and Im happy with the purchase. Hope this helps...heres the link to gripstuds. $100 for 100 of them. If anyone needs any I can sell 50 as I dont need this many.
http://www.gripstuds.com/1500_Tire_Stud.php