Going from an iPod touch to the Eris, I found that Mixzing was the closest to it, and I loved that I could choose the folder where it found the music. I love that the stock player comes up on the lock screen, but I hate that it shuffles in ringtones that I added. I also think the minimal Mixzing widget is the best i've seen. I use meridian for a video player but as a music player it's hideous and it always skips when changing songs for me. I don't use any of the "suggestion" parts of mixzing at all. It's also free!