Just remembered I have an old 2.1 set where the speakers kept cutting out, but the sub was fine. It's definitely low-end. But could I use the sub in the short term (with the Dayton speakers and Lepai, or with a receiver), or would it just be a liability at this point (or not compatible)? I have taken a look at receivers online, and it doesn't look like I can get one for cheap (although there are a couple of places nearby where I will check to see what they've got used), and I was thinking of starting out with just the Dayton & Lepai. Would this sub be useful at all in that setup?
Insignia NS-3099 (http://reviews.cnet.com/pc-speakers/insignia-ns-3099-speaker/4507-3179_7-32154881.html)
Also, if I did go with a DAC, I could get the Hifiman HM-101 for about $50, as compared to $75 for the Fiio. I'm assuming the Fiio is probably good enough that it'd be worth the extra $25, but what do you guys think about the 101?