My 2 cents
I must confess that I also have a thing for the B&W sound...
My IMO the 600 series offers the best value, in regards to sound quality vs. price. Based on the options you've presented I would go with number 2. However, after doing a quick estimation of your budget I have another option for you to consider. Keep the 602’s as your fronts, and the LCR 60 as your center, but save a hundred bucks and go with 600’s for your surrounds. For most HTs the crossover point is set at 80 Hz, so the 600’s will work just fine as surrounds. Now forget the B&W sub at the price point you are working with, they are just not a good value. Take the hundred you just saved by going with the 600’s and what ever you were about to spend on a B&W sub and go buy yourself something nice from Hsu or SVS, you will not be disappointed…I promise!