Yikes, I’d say start slow and get an idea as to what you’re getting into. The concept of modular is cool, and the idea of “unlimited possibilities” is really enticing, but to achieve that is very expensive. I also feel it’s a total pain in the ass to work with. It’s cool at first but gets old after the 20th time of unplugging everything and then organizing all your wires. I have three cases full of euro, and the DT/DN combo and can say that those two are much more easier and just as much capable of making interesting results. Perhaps what you should think about is creating a sound efx/mangler case. Something that has what the DT/DN don’t have. Stuff like wavefolders, randomizer, and maybe an analog kick and hats module. Combine that with a CV OCD and you can happily unite both worlds.
I’ve read quite a few tales of people going all in on modular only to a)Never have enough time to jam out, or b) feel constrained because they still don’t have enough modulators and are out of space, of c) realize that it’s a total pain in the ass to not only clean up, but to achieve a decent, organized, set of sounds that don’t sound exactly like what everyone else is doing, which is chaotic electronic bowel movements.
It’s not uncommon to see on ModWiggler people selling their entire cases because they’re just over it, and the initial excitement is gone and they end up taking really big loses on what they paid (which coincidentally is a great place to buy your modular needs; also try not to buy new if you can help it as the depreciation value for most modules is pretty steep).
As far as recording out-of-the-box, (I’m assuming you meant in-the-box) get yourself a Tascam or Zoom recorder and use that to record your impromptu sessions. The Zooms are really awesome, and can also be used to gather found sounds that can then be loaded into your DT.
I should inform you that I’m also 40, so my excitement levels are a little lower these days, and just thinking of all those wires makes me want to nap. I’m also a bit lazy so factor that into the above dissertation.
Do not sell your DT and DN. I guarantee you’ll regret it. The DT is legit one of the greatest samplers/drum machine of all time. The DN is certainly no slouch in the synth world either, and I’d easily place it high on “best fm synths” list. Maybe you’re hitting a creative wall, don’t blame the machines, take a break, watch some videos of how other people creatively use those two. Dive deep into the modulation possibilities. Now that the DT has two lfos you can get some really crafty and unique sounds. Experiment with the DN’s secondary osc menus. The extra envelopes for carrier a and b are capable of amazing results. There are literally over 100,000 modular samples out there, plug those into the DT and go ham. I very rarely see people who don’t regret getting rid of those two.