I'm looking at tablets myself. Personally, I can't live with Apples strangleware philosophy, so the iPad is not an option.
I found that the 2 tablets topping my list currently are the Samsung Galaxy Tab 10.1 and the Asus Transformer Prime. So far I haven't been able to choose, as both devices have some strong sellingpoints.
I like the Samsung a lot because it has a Wolfson DAC and with the usual mods (Voodoo etc) can be made into a decent sounding device. Another thing I really like is that there is a version that has 3G on board.
I like the Asus a lot because of the hardware keyboard and the fact this keyboard dock has an extra battery onboard gives it great runtime. The form factor of this device and the processor it has on board could make it suitable to be used as a full replacement for my netbook.
My problem is, I want one device that does it all and does it well, but the realtek DAC in the Asus is not that great, the keyboard dock for the Samsung on the other hand is designed for desktop only use and is very impractical on the go. So for now, I'm waiting a bit. I hope ICS will support USB DACs soon, the minute this update is available for the Prime I'd buy one.
But in your situation, where music, video and gaming will be the main use, I'd go with the Samsung if you don't want to wait for what might be coming in the near future..