Topping is a brand we have looked at for some time now. Following their growth and product line that again and again offer high quality, simple and affordable audio products. With their new dac's you get a chance to taste hwo good affordable digital audio is today. We have of course tested their models on our reference system and must say that among sigma delta converters they are pretty good for the asking price. Check it out.
Here is a couple links to reviews, testimonials and informative articles: