The Asus Transformer kicks the iPad's (and every other tablet) butt. I have a TF201 Transformer Prime and I love it. Just bought my wife an Asus Infinity TF700 and it rocks. Both of them are very fast (my TF201 will kick an iPad 3's backside all day long and its almost 18 months old), very capable, and have stupid amounts of battery life (especially when you add the dock/keyboard).

I travel 75% of the time and my TF201 goes everywhere with me. Its been beaten, dropped, hit, and abused and there isn't a mark or scratch on it.

The best thing about the Asus is that it runs Android -- and that makes it all full of win compared to anything that Apple has. Especially when you take into account all the security issues Apple has with keeping people's information private.

As for your Flash requirement - give up on it. Flash is unsupported past Android 4.0 (ICS). Still runs great on my TF201 though.