Sorry if this is taking it off topic from the OP (please berate me if it is).
I did a lot of research into Line Array theory and speaker building prior to starting the project. We had the use of a L1 mkii for a weekend at our church (gymnasium with wood floors/ block walls/ metal ceiling - an acoustical nightmare which meant speech and song with a "conventional" mid/hi system was a nightmare esp when adding in monitors) and the difference in clarity and intelligibility was tangible. Unfortunately Bose was too expensive (over 2.5k euro) so I thought that I would build one! I used 32 tangband drivers 2" Mid/Fullrang W2-852SE/SF/SG (16 in each section wired to 4ohms for each section which, when connected together, gave me a seven foot column of 32 speakers at 2ohms capable of handling 32 X 15 watts = 330w. Efficiency of the line array physics of combined drivers means that I have never needed to drive the column anywhere near it's max - even on one outdoor gig where I covered 250 people with it (presentations, ambiance music and then backing music for Irish dancers). Used a diy built T18 as the sub (20" squared box -horn sub with an 8" speaker from Bill Fitzmaurice designs) which is run with less than 50 watts of input and easily covers the bass end of things in a room approx 25 yards square. They are very efficient designs but you can buy plans for greater power output subs at the same site should you need it.
Both builds took a bit of work. Line array took a month or so of evenings to research, model various candidate speakers, design the column with ISD free speaker software, source materials etc. Sub took a couple of days to build and is easily in the scope of most people with a bit of handy skills and a few tools.
I run a DBX PA system to control crossover, limiting, feedback suppression and eq duties to the rig. Had to attenuate down the column speakers sooo much to keep them balanced with the sub. Adding an additional sub would open up bigger audiences.
Shortcomings would probably be in the mid bass frequency - I crossover at around 120 which is high, but this is a protective measure. The xmax for the drivers is 2mm and I am being overly careful to prevent this happening BUT I never drive them anywhere near to this so I could probably tune the column / sub a little better.
Comparing what I have to the L1 - if money is no object the L1 is such a compact solution that it is hard not to recommend (so long as you accept the compromises that using smaller speakers in a line array bring). I couldn't bring myself (nor the churches equipment budget) to that level.. i estimate cost of column was about 400 euro all in (inc hardware, special speaker paint, custom metal grill etc) and the sub was 160 euro (most expensive part was shipping the 25 dollar driver from the States which ended up costing 65 euro!). Secondhand DBX PA and a new Mackie rack amp were an additional 500 euro so I got a system for just under 1200 euro. Factor in the time it took and then it doesn't look quite so rosy - it did become a bit of an obsession getting it done.
BUT I get nothing but compliments about the sound - great evenness throughout the venue, speech is FANTASTIC, we put all the musicians through it (ac guitars, drums, vocals, synths, bass, bodhrans etc), AV presentations sound great and it ...just.. works for this very specific application. Have use it in a coffee house environment with and without the sub and again, it works great for our purposes. It is so portable and easy to set up. 3-4 mins and we are good to go. No monitors needed - the spread of the output allows our musicians to hear direct from the speakers (we used to have lots of difficulty with our musicians getting a reasonable monitor mix with our convention FOH / wedges. The paradigm shift to Line Array took a little getting used to but our main musician never bothers wearing his in ear headphones for monitoring any more - says it all).
If I were to start the task again - I would consider larger drivers with a great xmax and a lower Fs so that mid bass / bass in the column would be more even and I could possibly dispense with the sub for some gigs (ie no huge kick and bass needs).
Hope this helps and ....sorry again if this took us far off topic.