This browser from mozilla works good it is 64 bit and can be set as default. It works with Adobe square 64 bit flash player and Adobe reader version 8.2(the only version that works without crashing). I think they have renamed Namoroko to Firefox. You can download the 64 bit beta version here: Firefoxownload - Mozilla x86-64
If you want to install adobe reader version 8.2 you have to declare your operating system as windows 2000 sp4 or windows server 2003 on the download page this version works good in win 7 64 bit.