Connectors are something we have considered in great detail even to the point of putting them in acidic solutions for a while. Like you say we're uk based and quite flexible - We offer our systems with pyroclips / micropyroclips / speaker connectors and the more reliable german push connectors (which we use on our trigger inputs). Stainless steel "speaker" connectors offer great reliability at a reduced cost.
It's not so much the metal part of the connector (although I'm surprised that anyone is making speaker type connectors with stainless as it would have a relativly high contact resistance compared to other contact options and most applications wouldn't need stainless, plus at some point they'd have to connect the stainless bit to something solderable) but the plastic. We've found that the plastic on the speaker type connector first gets attacked by UV in daylight which weakens it and then (particularly in cold conditions) it just cracks and breaks

Are you saying that you can offer pyroclips as an alternative?
If you are concerned about connectors, then give some thought to the "centronics" connectors pyromate/fireone use. Not trying to slag systems off just offering advice.
AIUI the digital nighthawk uses 4 pin XLR, the centronics connector is a "legacy" thing to allow use of older analogue modules. Also with fireone the "slats" are available as an all in one setup that doesn't use centronics type connectors.
The most significant advantage of our system against any of the others, is that our units are all stand alone - programmable and also interfacable in a multiple system environment for remote control. In simple terms, if you have 5 digital modules, you can fire 5 shows on one night, or a big show the next day using all 5. You don't need 5 firelite panels, or pyrodigital controllers.
I must admit that's quite interesting, one thing about our shows though is that they can be quite "organic" e.g. firing can depend on what human performers are doing and timing can be variable, but for other parts of the show we require the speed and precion of automatic firing, so mixing auto and manual easily would be a nice feature (we've borrowed a pyrocontrol desk in the past which allows this to some extent but the programming is very basic), also we have a big distrust of relying on a PC to control everything so a manual firing (i.e proper switches to push on a waterproofed reliable box) option for when the PC crashes (or gets inadvertantly soaked in seawater!) would be nice, can your system provide that?
Lots of pro's including the software. The largest firework company in China fell in love with our software, previously using pyrodigit and pyrodigital.
a demo version of the software would be nice to see.
A demo / use of a unit can be arranged!, but not till after November I'm afraid... all loan units are out.
I assumed that would be the case

after November would be fine.
Oh sorry one last question, is there any practical distance limit on your system if using cables, and do you have a wireless interface? (we don't like wireless but on occasion it can't easily be avoided) mind you if you're using RS485 then we already have some wireless modems that could cope with that.