SSL ciphers, disable or not to disable RC4?

[Pekka.Panula at sofor.fi]

Hi

My current values in my nginx configuration for ssl_protocols/ciphers what 
i use is this:

ssl_protocols      SSLv3 TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers          RC4:HIGH:!aNULL:!MD5;
ssl_prefer_server_ciphers   on;

What are todays recommendations for ssl_ciphers option for supporting all 
current OSes and browsers, even Windows XP users with IE?
Can i disable RC4?

My nginx is compiled with OpenSSL v1.0.1.
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