I'm actually partial to the Sako 85 varmint chambered in .204 Ruger. True, it's not quite this beastly, but it's hella fast, the 32gr rounds I use still crank out about 1500fps at 600 yds (not that I've hit anything from that far, mind). It's a great gun for shooting prairie dogs if you can hit them (the Kansas winds are a bitch though).
I've never heard of that model. Personally, I'm not a big fan of rapid fire (in the event of zombies, all you need is 1 bullet to the brain, so rapid fire is a waste). However, some of my associates (namely, my girlfriend & her family) are of a species called "jorogumos" (Japanese shape shifting spider-thing), & members of that species tend to have an addiction to automatic fire when they use guns.