I got down to exactly the same decision when I bought. CGM or IBM.
I drove both and sat them side by side in the sunlight. The deep metallic colors of the CGM won me over. Pictures cannot capture it.
However, there isnt a wrong choice here. It is simply a matter of personal taste.
The IBM is also very very beautiful.
Jannetty 75 RWHP Performance Package and Tune.
MRR 228 Wheels on Continental DWS06 Extremes.