[LAU] Sonivox

I have a project coming up to compose some music for a video game I'm making. I want to keep costs low everywhere except for sample libraries. Given my past experience I'd like to overspend there a bit. I'm really impressed with how Sonivox samples sound and I'd prefer to do my sequencing and mixing with open source tools. I'm shooting for a tween bubble gum sound hoping to appeal to the "likes iCarly" crowd. I'm interested in opinions/pointers to the sequencer, audio effects, and any experiences people have had with sample libraries, particularly Sonivox. I'm comforable with Ardour although I have doubts about my actual mixing skills. -- Darrin