my suggestions are :


4>FH-1 Expert Sleepers
5>EURO Brute Numerical MiniBrute Expander
6>Intellijel Audio Interface II and or μJack/uJack

if your interest is musical compositions as opposed to sound design i would replace most of what you have with
a complete synth like Anushri Mutable instruments
you will save allot of money in the end.

and a must have in any system is MATHS or FUNCTION
cheers