What was "easily better"? Do you have the definitive ranking of passive two-way stand mounted speakers? In my book, they're all hopeless except at very low levels or for duties such as TV sound.
I think I should have gotten JBL 306s for a few hundred bucks and chucked my amps.
Sierra-2
http://www.ascendacoustics.com/pages/products/speakers/SRM2/srm2meas.html
BMR Philarharmonitor
http://www.philharmonicaudio.com/BMR Philharmonitor.html
The star is the RAAL True Ribbon Tweeter, easily one of the most accurate tweeters out there, due to it's significant lack of inertia (0.0075 g weight, http://www.raalribbon.com/products_flatfoil_70-10.htm)
The SEAS woofer on the Sierra is very capable of producing an accurate mid to low end, I can't speak much about the BMR / ScanSpeak combination found on the Philharmonitor, but they test very closely to each other.
Either of these are going to be more accurate and less fatiguing than the LS50, based on my own audition and ears, and how similar the Philharmonitor is to the Sierra-2.
The Sierra-2 goes on sale annually, either direct from Ascend, or through Massdrop. At it's discounted buy, it's easily the best in its price range.
As part of a HT system with subs, you may want to go with a Sierra Luna front ported speaker for easier mounting options. In 2.1 form, the Sierra-2 and Sierra Luna sound similar with the assistance of a sub.
Best part, if you don't believe me and are located in the US, you can audition the Sierra-2 for free.
http://www.ascendacoustics.com/pages/support/30dayguar.html