Owners of Delphi, C++Builder, and RAD Studio XE5 can recharge their version to XE6 for half the upgrade price. To be more precise, you are going to pay a little less than 50% of the upgrade price, so even by buying a recharge twice in the year (for each release) you'll spend a little less than doing a single, regular upgrade. Some exceptions apply, but most versions and editions are covered.
This is the new "license recharge" program Embarcadero has announced a few months ago, now in action. You can read a complete description and find the FAQ at www.embarcadero.com/products/rad-studio/recharge.
My suggestion: buy the new versions as soon as possible (ASAP), to gain the full benefit of the new release sooner. If you have XE5 and would like the extra features and quality in XE6, use the recharge program right away (directly or through one of our sales partners) to move to the latest and best Delphi and C++Builder available.