I have ML SL3 for almost 3 years now and I have heard a few expensive systems but I still like the transparency that ML offers. ML excels in mid to high and even performs well at 200-70Hz bass region but it lacks the deep bass that my friend's 801 S3. If you like bass then you should look for a used pair of 801 S3, it is awesome. Adding excellent sub-woofer like Velodyne HSG15 still does not have a same continual and integral sound as the 801. For about $2500 a pair used, you can't beat that. If I am buying new speaker now, I would pick 801. Bottom line is you need to like the sound first and don't let the brand influence your decision. Happy listening.