Do you officially know you're getting this drill mate? If you do then start talking about how much you're looking forward to using this new BLUE bit of kit. Explain it's advantages over the green one because the BLUE one is just so much better, she'll go glassy eyed but keep it up and hope she takes the hint.
If you don't officially know about it then start talking about how much you're looking forward to buying the BLUE one after Christmas, show her it in catalogues etc etc.
It might work, you never know.