2nd - The SS is a balanced head unit and basically no matter what you do you have to use balanced input/output DSP and amplifiers so cross the cheap stuff off you list.
Failing to do this will give you a nasty steady hiss and pops galore.
the factory head unit puts out a dead flat 4-5 volt preout signal so its glorious for good equipment down the signal path. This means that Alpine amp may need to go.[/QUOTE]

Why would he need a balanced in/out dsp? Wouldn't the JL TWK work with balanced inputs only?