Do you plan an hanging lots of attachments off the front? I'm not a fan of the quad rail handguards for most applications, they aren't comfortable to shoot off-hand and they add weight up front where you don't want it. Unless you are hanging a light, pistol grip and other such items on the rail, I don't think it's worth it.

Especially if you are using this mainly for varmints, you won't need anything more than a bipod and a scope on the rifle.