It really depends on your style of play. If I were to buy a newish racquet that wasn't too expensive, I'd go with the previous Head models, from the LiquidMetal series, maybe the L4 Radical. They were expensive a few years ago, but now that the Flexpoints are all the rage, you can get them new for under $90 and should probably be able to find a used one for even cheaper. It's a 10.4oz racquet, which is a good medium weight (your girlfriend's is probably much lighter with a thick frame -- I can't stand those light racquets). Like I said, though, it really depends on your style. Go to a Sports Authority type place and demo a few different styles of racquet. The L4 may not be right for you, but there are a bunch of different swing styles in the LiquidMetal series.