I like electronica, too, and totally agree with the idea of getting at least one sub - I don't think there's any question of how important sub-bass is for EDM/IDM!
Honestly also not sure about the benefits of two subs, though, as those funds can be put into better main speakers or room treatments for more immediate benefit. You can always get another F113 down the road.
At the end of the day, you HAVE to go listen to things to find the right system. Demos are absolutely a must.
Another tip is to widen the source/amp combo shortlist. I agree you want gear that has tight bass and mid-bass with refined treble (not all modern dance recordings are that good). In terms of electronics, I'd throw these into the mix: Bel Canto, the Chord Chordette QuteHD DAC, even Naim gear and perhaps the NAD M2 integrated.
Dynaudio is a great choice, but high SPL is a concern for most 2-way standmounts. I might add PMC and ATC to your speaker list. ATCs can play SUPER-LOUD, though not everyone likes the accurate, unromantic presentation.
On cables, well, it's definitely the worst investment one can make sound for pound, but in my experience, it is annoying but true that they can make a difference. Specific gear and room acoustics are variables to how much.
I'd start off with basic cabling for power, interconnects and speaker, then buy/flip more exotic things used, or try out cables from places that offer money back trials, and/or use the Lending Library from The Cable Company at different price points.
In my system, I really like the Canare cables I got from Blue Jeans (preferred these to Mogami and Belden). Good luck!