I run a custom set on both front and rear, and am very happy with how it handles. Whether you run on ppavement, dirt track, or construction sites, the savage can benifit greatly from sway bars. There are a number of guys on here that have the GPM setup and I haven't heard any bad reviews on it.
At any rate, if you get only 1 set to begin with, put them on the rear. That's where most 1/8th buggies run 1 set, makes sense for some reason. If you like the handling with 1 set, and can afford another later, it only gets better.
Best of luck,
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