@ Nasty
The other thing you have to be careful of is trying too many conversions. For instance I have found it very difficult to transfer models from Amiga to PC because even if I saved a model in DXF for example and loaded it on the PC side, I found defects or problems with the model. This applies to Cinema 4D on Amiga, exporting a DXF for use with Cinema 4D on the PC. Even transfering models from one program to another on a PC only is problematic. I just exported a model of a spring-loaded clamp I made in Cinema on the PC as a Wavefront .obj and then imported it into Poser 6. Several key surfaces were lost. When I did it the other way around (export from Poser to Cinema) the result was a lot better: only one area of defect.
And the more steps you have in your conversion the more likely it is that you will cause defects along the way. There is a 3D model conversion program called Dust on the Amiga and I played around with that quite a bit a few years back. It is very difficult to convert these models so that 100% integrity is maintained and I would advise that you stick to one platform and one program if possible. I haven't used Aladdin but I've used Real3D, Imagine, Lightwave and Cinema4D all on the Amiga. I found that Cinema 4D was the easiest to get into. It was given away free on a coverdisk CD (don't remember the magazine and my Cinema is original with manuals), so you have the added advantage of not having to pay for it. I can tell you that you will need quite a bit of RAM and an 060 is highly recommended if you want rendering times to be bearable, but expect to wait...
But then again do you want to spend several hundred £ on the PC version and not wait, or do you want to spend hardly anything but wait quite a bit? Perhaps the best thing for you to do is try the Amiga Cinema 4D and then decide how interested you are in raytracing.
If you do anything with serious committment you are going to have to use soemthing other than an Amiga. That's the reality of the hardware limitations and the lack of software updates for our 3D programs.