[SANDW1CH]

Not an all-inclusive list by any means, but these seem to be the most popular.
There will certainly be many "it depends" with answering these, so this is purely subjective and based on YOUR preferences.
 
GD-Audio Sparrow Basic
NuForce Icon uDAC
ZERO DAC
EF2A

 

[David.M]

Musiland Monitor 02 US.

 

[krmathis]

[size=10pt][size=10pt]Matrix mini-i[/size][/size]
[size=10pt][size=10pt]May not be the "best" inexpensive DAC/Amp, but it sure makes a strong candidate. I really enjoy mine[/size][/size]

 

[AVU]

Sparrow for stationary
iBasso D4 for portable

 

[hngls]

Matrix mini-i FTW

 

[cravenz]

Quote:

[size=10pt][size=10pt]Matrix mini-i[/size][/size]
[size=10pt][size=10pt]May not be the "best" inexpensive DAC/Amp, but it sure makes a strong candidate. I really enjoy mine[/size][/size]

would be interested to know how you rate it alongside other DACs you have tried

 

[krmathis]

Quote:

would be interested to know how you rate it alongside other DACs you have tried

Yeah, but I have not compared it to my Isabellina.
The Mini-i makes a nice DAC/Amp for the office rig, driving a pair of K240 Sextetts. Never even tried it as a pure DAC.

 

[nikongod]

The best inexpensive amp&dac combination is the cheapest, which is typically included built into pitiful, portable picnic players.
 
Come with uncle and hear all proper! Hear angel trumpets and devil trombones. You are invited. 

 

[francisdemarte]

Define inexpensive? My fav is the Aune dac/amp

 

[SANDW1CH]

 
Quote:

Define inexpensive? My fav is the Aune dac/amp

I suppose inexpensive can be subjective as well.  To me, it would be less than $300.

 

[baka1969]

I think the Nuforce Icon Mobile and iBasso D2+ Boa each make strong cases.

 

[grokit]

I vote for the Mini-i and uDac being the best available in their respective price categories; the Hot Audio DAC-WOW is also very good at its price point.

 

[Yonv]

ibasso D10 is one of the most versatile DAC/Amps in $300 price range.
 
http://www.head-fi.org/forum/thread/399315/ibasso-d10-updates-1st-page-with-current-opamp-choices-by-hiflight-images-page-1-12-13-14-15-21-71
 
http://www.ibasso.com/en/products/show.asp?ID=39

 

[kboe]

My vote is for the HeadRoom Total BitHead! $150.00 of pure goodness.