I think this is the case:

Hexagon - just a modeler (a very good if you know to model)

Vue - an lanscape creator that can interact with C4D in the XStream version (lots of money here)

Cinema 4D - complete 3D solution with model, render, animation, hair, particles and other features (lots of money here too)

In resume you can use all them, but first take you time to Cinema 4D if you have the money to buy it. At same time for almost the same price you can think in XSI 7 too that have the same tools but its more used in big productions.

Boolean: a problem in ANY software, you need to know what you are doing, the better way is using extrude to get the same result, more work but better results. In general box modeling can be very helpfull in this case, so just try to avoid booleans.

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