ive posted lots of tips in the past on laptops if u search under my name.
but best bet is to test lots of laptops like i do.
here we go again.(general guides.)
1. stay away from celerons. core duo 2.
2. xp if possible.
3. upgrade internal hard drive to 7200 rpm.
max out ram and add a second external drive to record to.
you could try an external 16mb cache 7200 drive in an enclosure.
eg acomdata . but youll have to test it.
these normally connect over fw or usb.
someone could tell you a certain lap works for them,
but this doesnt mean it will for you.
cos there can be manufacturing changes for example sometimes.
thus the motto is TEST TEST TEST ! before buying the lap.
with say reaper plus your choice of sound interface.
a cheap little interface i was given as a present is a line 6 toneport gx.
i'm using with reaper. i'm very happy with it due to its low latency.
but its one trak recording at a time.
huge value for money imho for getting song ideas down.
if u search i posted a review on GS.
hope this helps a bit. TEST BEFORE BUIYING.
ps...oops ...noticed you want 8 trak at a time recording.
this means definitely u need a fast drive to record to...
and i suppose youll be useing the orpheus as your interface.
( i looked it up...VERY NICE !!)
thus i would test various laps with orpheus to get a feel on performance.
in reaper make sure you identify in reaper preferences the orpheus drivers that reaper