Using BSPlayer here on a Galaxy Tab 10.1.
Works great for both video and music.
There's a free, ad supported version you can try. I used it for several months and then bought it. Paid version has the ability to increase pre-amp volume, which is why I bought it.
Has two modes, local for files on your device, and LAN for files on your PC.
I use it every day, mostly for movies on my computer. Works without issues.