Main reason I bought my Kindle Fire HD over the Nexus 7 is because of it's great speakers. After rooting it and adding Google Play I think it's a pretty decent tablet. The speakers are loud and sound pretty good. I also the HP Touchpad and I'd say the are pretty similar.
Intel i5-2500K 4.0GHz, 16GB, ASUS P8Z68-V/GEN3, GTX 680, Intel 520 Series 180GB
Seasonic M12 700 watt, Cooler Master Cosmos S, Scythe Gentle Typhoon 120mm fans
Asus ME400 (Vivo Tab Smart), iPad 4, Kindle Fire HD 7, Nexus 4, HP Touchpad