Ramiro
I listened to both set ups, and went for the B&Ws. I've got 602.5's and an LCR600 up front with 601's for surrounds, would probably buy 600's now, but they weren't out when I got mine last september (may get a pair of 600's to use for surround back in the next few months when i uprage to 7.1).
There were two reasons I went for the B&W set up. I thought that they were more involving to listen to, and seemed to give a fuller soundstage. And at the time, you could only buy the eggs as a package and not singularly, so i wouldn't be able to upgrade to 7.1 as easily.
You might find the 603's a little overpowering with the LCR60, my dealer even suggested getting the LCR600 to partner my speakers, which are much smaller than the 603, and have fewer drivers.
I had originally considered getting the 603's myself, but the dealer talked me out of it, and saved me money, as he said the extra low-end range would be wasted when I got a sub anyway (not got one yet as i decided to wait as little while so i could afford a better amp).
Which amp are you using, i'm running mine with a denon 3802, and from other posts on here, it seems a few people are using this amp with the Kef eggs with good results.
Speaker choice is really a matter of personal preference, so the best thing to do is arrange a back to back test if you can, but you can't really go far wrong with either of these choices.
Hope this helps,
