I am setting up a secondary computer as a studio backup computer. I need a decent soundcard that can work well with Sonar... I have a breakout box I can use if needed, his is something for emergencies. Don't want to spend a lot. Don't even need balaced in's for this. Any recommendations?
 
- Alan

you didn't say how much "inexpensive" is to you.  inexpensive is relative to different people.
 
my backup soundcard is a roland duo capture.  I like it because it can run on batteries or AC input power, but does not rely on USB for power.  
 
http://www.musiciansfriend.com/pro-audio/roland-ua-22-duo-capture-ex-usb-audio-midi-interface
 

There are inexpensive Behringer's if that is what you want.  
 
I have a backup for my 8 channel MOTU 896Mk3 Hybrid and its a Focusrite 2i6.  Its not 8 channels like the MOTU but I could get by if the MOTU shot craps during a recording session (that is usually 4 tracks or less).
 
I would suspect a PC failure would be more likely than the recording interface unit.  
 

Generally we upgrade our gear and the old gear becomes our backup not the other way around. 
 
Most computer stores will sell you a re built box for cheap as they quickly become doorstops. 
 
Personally I would upgrade my main DAW and interface and do as I say above as apposed to buying a bunch of cheap junk as a back up. That's sort of a waist of money. 

Considering there are a few decent interfaces that can be had new for $150 or less, I'd start at that baseline.  Because I'm on Firewire, my two backup units are the TC Electronic Konnekt 24D and the Konnekt 6, both of which I picked up cheap on Ebay.  I actually use the Konnekt 6 as a general-use sound card for my main PC.  Great DA converter/headphone  amp, and it cost me all of $50.
 
For USB2, I'd go with the Steinberg UR12 ($100 new).
 
If you're okay with B-stock or used, then shop around on Ebay or Reverb.

That's exactly the advice I want. I'm installing everything on to a spare computer that happens to be a pretty high end i7 that was being used to surf the net. 

The Focusrite 2i2 works well for me as a descent 2nd unit.  I can travel with it because it is USB powered and can be driven by my laptop.  Fits easily in my laptop back pack.  The 2i4 is similar with more outs, but a little more costly.  
 
 

TAscam has a new 1 pre/2in interface.  Sub $100.  It should work fine