MOTM

My first real encounter with modular synthesis was couple of 
hours with an ARP2600 (an earlier grey model), and it 
changed my life. 

I wonder, what is so typical of the 2600's sound (which I 
love)? Is it the filter? The oscillators?

What would I need (if possible at all) to get that sound 
with a MOTM system?

Thanks,
Robert (counting down the weeks for his first MOTM shipment)