Here is a table of the combinations I'm considering and their total price. Hopefully it will be helpful to others, and perhaps I can get some feedback like, "that combo is stupid cuz it costs more than the other one and sounds worse"
First, the list of components and the rough prices I've asigned them- please correct me if I'm significantly off. Obviously, in some cases there are options that change the price a lot. I cant spend ALL day on this though
fixed sources:
rme - $300 (probably cheaper, but since there are also more expensive options and mods, $300 seems fair)
any computer - $0 (anything with a usb port that is)
extigy (or other existing card w/ spdif) - $0
portable sources:
ihp-120 - $300
terapin mine - $150 (may not serve- requires hacking)
used, small notebook w/ usb and decent battery life - $400
DACs (or usb sound cards with good DACs):
total bithead - $300 (refered to as bithead)
piccolo - $200 (-$40 without machined faceplates)
dack - $500
ppa w/ dac - $750
sostenuto1 - $400 (-$100 with a little DIY)
cosecant - $3500
portable amps:
total bithead - $300 (refered to as bithead)
total airhead - $200 (refered to as airhead)
xin superdual - $150?
ppa w/ dac - $750
sostenuto1 - $400
ppa - $500
Ok- on to the combos. The totals are rough (like the prices)- I'll edit in any corrections provided or noticed by me. Not everything is covered- just the ones I'm considering at all:
total price - fixed source-/-portable source->DAC->amp
$400 - any computer-/-terapin->bithead
$600 - extigy-/-ihp->piccolo->xin superdual
$700 - any computer-/-cheap small notebook->bithead
$700 - extigy-/-ihp->piccolo->airhead
$700 - extigy-/-ihp->sotenuto
$800 - extigy-/-any pc-/-ihp->piccolo(opt)->bithead
$900 - rme-/-ihp->piccolo->xin superdual
$1000 - rme-/-ihp->piccolo->airhead
$1000 - rme-/-ihp->sotenuto
$1050 - extigy-/-ihp->ppa/dac
$1100 - rme-/-ihp->piccolo->airhead
$1300 - extigy-/-ihp->dack->ppa
$1600 - rme-/-ihp->dack->ppa
$4000 - any computer-/-cheap small notebook->cosecant(portable?)->ppa
Pending info on the terapin mine, I'm leaning towards getting a xin superdual, then a piccolo, then an ihp-120/140 and finally (hehe) an rme pad.