Actually the LSR 305 series has not been around that long. The LSR 6 and 8 series (discontinued but occasionally pop up on EBay) were around for quite awhile before the 305's came out a few years ago.. I have had the LSR8's and LSR12 (subwoofer) for years and have been very happy with them. The LSR8's are big, heavy and I think ran about $700 each. The 305's, by comparison are lighter and significantly less expensive. They seem to get good reviews but I am not sure they are really directly comparable to the older line. That isn't necessarily to say that they are not just as good or maybe even an improvement, just that the transition from the LSR6 and 8 line was not really a typical product evolution, more like a whole new product line.
Brian