Portable amps for grados

Hey guys

So since my computer version dac (I converted an old computer into a dac + amp with a bit of programming) cooked, I'm looking for a new amp. However, I need this one to be more portable.

I'm running with SR80is, ATH-AD700s, and TF10s.

I need one PORTABLE amp that can easily drive all three to the maximum of their abilities (yes, i know the ATH-AD700s are easy to drive out of a comp, but i want to squeeze as much performance and quality out of all of my headphones. Thus, an AMP + DAC would work well.)

Any Suggestions?

Thinking about 

HeadRoom Total Bithead/Airhead

Fiio E7

Please note, my source is going to be a rockboxed ipod 160 gig/ ipod touch 4g 8 gig or a better source which may come to me as a gift.

Quote:

Originally Posted by estreeter 

I am getting thumping bass with my modded SR60i and my new portable amp, but it cost over a hundred dollars more than your current choices - are you able to stretch your budget ?

depends. I have at most 300 dollars to spend on an amp + 1 carrying case (i'm planning to get the pelican cases, which are about 40 bucks with shipping.) I'm also modding my 4th pair of headphones in the future (sr60is: these are within the 300 USD budget too)

so now I have sr60s, sr80s, tf10s(might sell these. I prefer custom IEMs) and AD700s. 

What's your suggestion estreeter?

anything about the PA2V2?