I have immense respect for Lightwave since my favorite CG show ROUGHNECKS: STARSHIP TROOPERS CHRONICLES was done in Lightwave. Yes, it's an old show, and the animation isn't as advanced as can be done now, but some of the animation and models and textures and effects still stand as the best I've ever seen. I'm a Max user myself, but as I said, I have a great deal of respect for Lightwave.

However, your choice should be based on how comfortable you are in each program, how the interface and workflow work for you, what fits you, and which program is fun to work in.

You might also take a look at Houdini. They have a version that goes for around 2000. It's not used much here at rosity, but it is used quite extensively in the movie and fx business.

Talent is God's gift to you. Using it is your gift to God.