In need of help in choosing a DAC/Amp

[Jamesx]

I'm pretty new to this type of thing so am looking for a few different viewpoints to help me out. I currently own a pair of Sennheiser on-ear momentums, and may look to upgrade slightly in the future. I'm relatively happy with the sound given by my laptop and ipod but wouldn't mind improving the clarity and adding some punch to the bass if this is possible. Would prefer a portable DAC that I could use without my laptop as a power source. I Have had a look at a few FiiO products specifically the e17 but I'm interested in whatever you have to say.

 

The price range I'm looking at is <£150, preferably around the £100 mark but lower is fine too.

 

Thanks in advance

James