I use a Razer Orochi mouse too. It has a physical wheel and 2 buttons on both side. I really love it. The only thing that I didn't satisfied is that the 2 AA batteries can only last for few days(maybe one week depends on your usage, comparing with my logitech M505 which can last for almost 2 years!). I need to charge the batteries every week. But I know this is usual for a wireless gaming mouse because of their high performance. So nothing to complain. And you had better take the wire with this mouse in case of the power drain.
I have bought a Microsoft Wedge mouse and a Microsoft Sculpt mouse, But I really don't like their touch function. So I returned them both.
I have had my Oroichi (2012 model) for over a month now and i've only changed the batteries once after daily usage... do you have the 2013 model? One week seems really low, try updating the drivers from Razer's website.