I have no experience with the tungsten core bullets and I can imagine its an expensive experience. Of course you will recive rave reviews of the GS solid , but i think i read in "The perfect shot" that hemispherical roundnose monolithic solids were the best for deep and straight penetration.
For top resluts with 458 win I guess they are though to beat. Of course at $6.5 each, they are one costly bullet.