[vuntruong]

So,  I feel the need to buy an amp, and Mod it by changing caps, etc...So i was wondering which amplifier is best suited for this.  in other words, Which amplifier have low values caps so changing it to Film caps would be reasonable.  etc....   

 

[lbj]

Your best bet is to build yourself an amp, rather than buying one complete.  You can mod to your heart's content without worry about warranties, AND it's cheaper to boot.
 
http://www.head-fi.org/forum/thread/537398/list-of-diy-headphone-amplifiers

 

[Prog Rock Man]

The Musical Fidelity X-CANS/V2/V3, but not the V8 are great for modding. Have a look at this site dedicated to such...
 
http://www.rock-grotto.co.uk/xcanpropage.htm
 
Remember, as soon as you mod an amp if there is any warranty you will invalidate it.