Are sub £100 USB DACs worth buying?

[Goose]

I have a set of DT 770 Pro 80ohm headphones that i use plugged in to my onboard sound card (motherboard is an Asus x99 A-II) that i use for gaming and music (rock, blues mostly). I've never considered myself to be an audiophile so always ignored DACs/AMPs etc. as i've always been too poor to buy them.

I'm wondering if things ranging from this thing at £20 to this thing at £60 are actually worth the money when compared against onboard sound cards?

Thanks

 

[Goose]

I'd go with schiit or aune t1. Which is a tube dac with a solid state amp. You can buy cheap tubes for less than £15 for rolling that really make the dac shine.

Both out of my price range unfortunately, cant really go above £50-60.