Budget, MDT Oryx, solid, feeds perfectly without mods and can be weighted inside and out. They have new side panels with Mlok slots up front, or make your own front side weights. Mine weighs 20 lbs with homemade side weights and a poured internal lead weight. Balances 3 3/4" forward of mag well.
No holes barred option, MDT ACC Premier Gen 2. Came out just a bit after I went with the Oryx. 3 of my shooting buddies now have them, very nice. Solid, no feed issues, lots of room for weights and 2" longer fore end than Oryx.