The automatic (chronometer) version, model 2531.80, is the watch worn in the last three bond films. The quartz version, model 2541.80, was worn only in GoldenEye in 1995. The chronometer retails for $1750 while the quartz version retails for $1395.
The chronometer is a true timepiece that does not run on a regular battery like the quartz version. The quartz version will keep better time and does not need to be worn everyday to keep it wound. By contrast, the chronometer should be worn at least every other day to keep it wound. I have the chronometer, wear it every day, and find that my watch gains 2-3 minutes per month.
Basically, it's a matter of choice. Most people on this forum would go with the chronometer because it is a finely tuned timepiece that incorporates a lot of intricate craftsmanship. It is also the official Bond watch. The quartz version uses the same battery that would run a cheap Timex, so there's nothing truly unique or special about its mechanism.
On the other hand, most people would agree that the quartz version is far more practical for someone who just wants a nice looking, quality watch. You have to appreciate the craftsmanship that goes into making the chronometer to select it over the quartz model.
You'll have to judge your boyfriend's interests in making this decision. If you think he'd like a finely crafted timepiece that is the official Bond watch, then go with the chronometer. If he's the kind of guy who'd wear the watch only once in a while or get annoyed at having to reset the time every so often, then the quartz is the better choice.
