I was one of the early adopters of the M20D. I recently purchased 2 ea L3Ts and 2 ea L3Ss. Gigged in 2 differrent places Friday night and Saturday night. Let me be as clear as I can be, complete your system and buy the speakers. I play in a band (www.primitivecircus.com....shamelss plug!) that plays dance covers and it currently producing an album. Everything was connected via Link 6 cabling, wace were using IEMs on all 4 auxs, and our sound guy was doing his thing both nights via an iPad. It was marvelous, the comments and feedback we received about the crisp, well balanced sound were non-stop. I have to tell you I listened to the LT3s at a local store several months ago and was not impressed.....BUT the speakers were not connected to the M20D. My baseline frame of reference was QSC KW153s and KW118s. I am now going to sell the KW153s. The entire Line 6 system together is THAT GOOD. The stage was clean (no floor monitors) and these speaksers have a unbelievable pattern spread for their size. They are compact therefore much easier to load in and out of my van.(I have more room in the van). They are not light, but are no more heavier that the QSC counterparts. They are built like tanks. The subs (L3Ss) have wheels and the speaker bags for the LTs appear to have wheels as well, However, the L3T handle makes it very easy to move the speaker. You have probably heard that the system needs to be used together to get the full benefit and I have witnessed it first hand. The M20D is awesome with any speakers, but with the Line 6 speakers via Link 6 it goes to a unbelievable level. I can even use my QSC KW118 subs if so desired. I will keep the QSC subs just in case I need some extra low end this summer with large outside gigs, but I don't think I will! I can not stress how crisp, balanced the sound was and the coverage with just 2 tops and 2 tops was unbelievable. The first night the gigs was a small intimate gig, the 2nd night was a very large venue. I had the LTs dial at 12:00 and the L3Ss at 3:00. The M20D main volume never went above -10. The extra headroom is unbelievable. SO SIMPLE TO SET UP VIA LINK 6. The iPad app to run sound was amazing and didn't have one hiccup. It took our sound guy a little getting use to adjusting levels via the virtual encoders, but after a couple of minutes it was a breeze. There was some times a very slight delay when he made some adjustments the second night, but he was also at times 30-40 yards from the stage. Again, I can't recommend enough the whole system. Again, I am selling my QSC KW153s which are also very great speakers. I am a singer and keyboard player, The M20D is the first Line 6 product I ever purchased. I now own a Line 6 wireless microphone, a wireless relay for my keytar (yes a Roland Ax-synth which rocks) and now the speakers. AND I have 2 more L3Ts on the way. The price dropped and I made the investment and could not be more happy.
The Line 6 tech support has also been the best I have ever dealt with. I want to emphasise that my dealings with them have been mainly questions and not issues with any of the equipment I have purchased. Our guitar play just purchased a Line 6 amp and our base player is currently looking at buying a Line 6 amp as well.
Do yourself a favor, if you can complete your system......DO IT!