You will need a LOT of dedicated modulation sources to get the most out of a Basimilus Iteritas Alter. Something like the Voltage Block. Check out Baseck's videos to get an idea of what's possible, but only with the right setup. The Disting will give you access to a vast array of possibilities, but it's not as fun to use.
I finally broke down and bought a Disting Mk4. I hate menu diving, but it's an insanely valuable module. I also have the BIA, and I would have to recommend the Disting first, for what it's worth.
Have fun and good luck!