How much effort you put into choosing one interperetation of a classical work over another depends entirely on how much you are going to notice the difference. If you simply like the music, and know little about individual orchestras, conductors or soloists, then any recording will suffice - I fall into that catagory myself, so any recording will do for me. If you feel you'd like a specific orchestra, conductor, or soloist, your local dealer should be able to advise - pick an independent retailer who specialises in classical work, rather than a chain store - you'll get informed advice. I do know that the Nigel Kennedy recording is pretty spirited, and is known for that, so if you like a nice attacking rendition, go for that one. There's nothing really to avoid - if the orchestra is good enough to be recorded, tha average listener will be more than happy with their output.