screw this everyone, get the technic pack. here are just some of it's features: flatten areas quickly with dark matter tools, turn 256 sugar cane into a diamond and use it for your automated diamond farm, use a nuclear reactor to make UU matter that can be crafted into just about anything, turn almost any item in the game into something of similar value, make just about any redstone contraption 4 time smaller with RedPower, and cross breed crops to make things like coffee beans and overworld-compatible nether warts.
It adds quite a lot of stuff. You just didn't find them or use them.
VoxelSniper, a minimap, a keybinding mod, WorldEditCUI, etc. The VoxelModpack is more geared towards multiplayer.
And Technic is very restricting, even if it adds items. Voxelmodpack can be used on any vanilla server and singleplayer game, while Technic / Tekkit can only be used on Technic / Tekkit worlds.