I need advice on which speaker

Magnolia/Best Buy has a very liberal return policy and for the sake of a 75 mile drive, suggest you take advantage of this and buy a few a pairs knowing you can get a full refund from them.

B&W's have metal tweeters or in the case of their 800 series, synthetic diamonds.  Sonus Fabers have soft dome tweeters and both brands sound pretty dissimilar from one another.  It up to you to decide which you like better.  I think your on the track here.  Good luck! 

Id feel a little guilty buying a few pair of speakers from Best buy and returning all of them.

So would I.  But I would not feel guilty if I tested a few pairs and bought at least one of them.  I assumed this is what you were going to do as your initial post said that auditioning was a bit of a challenge and the your nearest Magnolia was 75 miles away.