There is no better time to get ready for the release of Visual Studio 2015. The new Visual Studio is coming in May 2015 and the prices have been reduced dramatically!
When you upgrade from Visual Studio Professional or Visual Studio Test Professional to Visual Studio Premium, the price is cut to 50%! And also get a free upgrade to Visual Studio Enterprise with MSDN automatically when Visual Studio 2015 gets released.

The offer is only valid for 2 months, expiring on June 30^th so hurry up.
But there is much more. Visual Studio 2015 license system has changed. These are the versions that we will have now:

• Visual Studio Community

  • Integrated Development Environment for building Web, Windows Desktop and cross-platform iOS, Android, and Windows apps
  • Ecosystem with thousands of extensions to choose form the Visual Studio
  • Free for open source projects, academic research, training, education and small professional teams

• Visual Studio Professional with MSDN

  • Professional developer tool for building any application type
  • Powerful features to improve your team’s productivity such as CodeLens
  • Improve team collaboration with Agile project planning tools, Team Rooms, charts and more
  • MSDN subscription benefits including access to core software for dev/test, Team Foundation Server, Visual Studio Online Basic, $50/month in Azure credits, training and support.
• Visual Studio Test Professional with MSDN

• Visual Studio Enterprise with MSDN

  • End-to-end solution for your development teams, including the most feature-rich Visual Studio IDE for working on any type of project
  • Build quality applications at scale with advanced features such as Load Testing, automated and manual testing and new IntelliTest capabilities
  • Manage complexity and resolve issues quickly with features such as Code Map and IntelliTrace
  • Enhanced MSDN subscription benefits including comprehensive access to software for dev/test, Team Foundation Server, Visual Studio Online Advanced, $150/month in Azure credits, training and support

Customer price has changed as well:

Here you can find a comparison between the different versions of Visual Studio, including the Visual Studio Test Professional (that is the most relevant product for many of us).]

References:

• Visual Studio 2015 Product Offerings
• Visual Studio 2015 Editions
• Visual Studio 2015 CTP 6 Download