Yikes, choosing which Victorinox knife to buy is a tough and very personal choice.
I really really wish that Victorinox would offer customized knives where the customer can choose which tools they want.
But until they do, you have to choose from the many many many different models that they do offer.
The first decision is the general size. This is the over all length of the knife when closed. Your choices are
Small - 50 and 76 mm. Don't automatically think that the smaller size SAKs have limited tools.
Medium - 76 and 101 mm
Large - 100 to 131 mm
It should not come as a surprise that the smaller SAKs are easier to carry and that the larger SAKs have larger tools.
As with any knife, it will be a trade off on carry-ability and desired tool selection and size.
I recommend visiting the Victorinox site or swissarmy.com. Both of these sites have pages filled with pictures of each of the models of knives. This allows you to quickly look for the features you personally prefer.
Unfortunately the CyberTool 41is discontinued but still can be found but it is getting hard. The current CyberTool is the CyberTool L which is a pretty wide knife!