Sounds like you can have a lot of fun with your system...
Yes indeed! I am really impressed with the L2t speaker system. Quite versatile. I had been using the DT25 in the more stereotypical sense of , I am playing electric guitar, should be using an electric guitar amp. But did struggle with getting the JTV acoustic models to work well with the DT25; there are several various threads in the past about people coming up with work arounds to bypass the amp modeling when using JTV acoustic tones.
What piqued my interest with your thread, is the idea that the L2t can be used to great effect to achieve that electric -and- acoustic in one speaker / amp; and it has an XLR out. I am thinking I will have to try that idea with my rig, and see what happens. It will be interesting to see how the M20d reacts to getting an XLR line level from the L2t, vs the mic level signal from the DT25.
In general, my back pain / chiropractor related issues became the most predominant factor in which pieces of gear and in what combinations would get moved any amount of distance, IE, to rehearsal or to stage.
Our drummer *was* going to be selling his house, so we cleared out all the electric rigs and haven't had a place to set up the PA and such since earlier in the year. Looks like he is going to take his house back off the market until next March, so we'll likely be getting back to the full rigs / electric setups this autumn and winter.
What I can say about the M20d that I like, is the programability - and the recording features. Multitrack recording option is awesome, works really well.
It's also cool to be able to dial in a full band 'scene' and recall that preset; sometimes we use more gear, sometimes less, so it's always pretty simple in terms of setting up from scratch too. A bit spendy, I can't justify the expense to folks on a casual basis - but if you can score one used, or on a good sale, floor model, etc, might be worth checking out. Definitely a different use of the L6Link feature; though with the full Bose rig you already have, doesn't make a ton of sense to spend $2k on the M20d, then need to drop another $2k on additional main / monitor L2 / L3 speakers..
The L6link really does some magic going from the M20d to the downstream L3/L2 speakers in a way that is a good bit different from the HD50 to L2/L3 link connections.
What got me thinking most, after reading your posts, was the feature of the L2t when L6linked to an HD500, to save the speaker mode! I think that is really cool.
The acoustic presets would want to be that full range type sound, and the electric guitars might prefer a more electric guitar amp type tone. I know the DT25 XLR out has a 'cabinet' / 'mic' emulation of some sort; when L6linking from the HD500 to a DT25, it automatically defaults to the 'combo poweramp' output mode,which disables the mic / air modeling being generated by the HD500. Supposedly, the transformer tapped out from the DT25 put the 'air' back into the signal, making it PA friendly.
For example; try this test:
connect your HD500 directly to your Bose rig, dial in an electric guitar sound, etc. Then, in the HD500 programming, switch your output mode from Studio/Direct, to Combo Poweramp, or Stack poweramp. It will likely sound 'worse' to your ears; it's usually a bit 'bees nest' sounding, especially with higher drive and gain setting or using distortion. It really prefers, when connected like that, to be in Studio direct.
One thing I am not sure of, is how the L2t will sound, in a similar situation. IE, when messing about with the HD500 output modes, while also messing with the L2t speaker modes, which are best suited for electric guitar, in a way that sounds good both in the L2t which is L6linked, and also through your Bose system, taking the XLR from that L2t, into your Bose rig.
Which is why I mention, doing that output mode test, so you hear the distinction between output modes when the mic model is on or off.