[Mamurai]

So I have been doing a bit of research, and come up with 3 contenders of what I'm looking for. It is pretty much a combined amp/dac solution which doesn't cost more than $1000.
I am hoping some of you guys have experience with one or more of these, as I'm looking for an unbiased/uncoloured opinion as much as possible, as I know many of these things comes down to your own opinion.
 
Here are the contenders in no particular order of favourism!
 
1. NuForce Icon HDP https://www.nuforce.com/index.php?option=com_k2&view=item&layout=item&id=26&Itemid=189/index.php
2. O2+ODAC Headphone Amplifier / DAC combo                           -                http://www.headnhifi.com/dac/o2-odac-combo
3. Woo Audio WA7 Fireflies                                                      -               http://wooaudio.com/products/wa7fireflies.html
4. ALO Audio The Pan Am                                                        -               http://www.aloaudio.com/the-pan-am
 
I know the pricing is quite differerent, especially when it comes to the Woo Audio WA7 Fireflies, and that is one I would have to save up for too. I kind of want to buy one without having the need to upgrade again (although that may be wishful thinking!). 
 
I am eager to see your replies!