Ocean Reef Neptune Space G FFM with integrated 2nd stages.
(added the Surface Air Valve, Quick Release hoses, and communications to the masks)
Ocean Reef SL 35 First Stages
Aqualung ABS Octos
I don't understand why you would use a full-face mask, particularly for travel, but you must have your reasons. They are, among other things, bulky; I will try to help in other areas.
What we are looking for:
BCDs - considering the Aqualung Zuma, thoughts?
I've looked at travel BCs, and been part of some discussions about them, and ultimately have come to the conclusion that my Deep Sea Supply backplate combined with a travel wing (my present wing is a little bulky) is going to be smaller yet more capable. I use a weight belt, it packs smaller than pockets.
SPG + Compass - considering the XS Scuba Pressure Gauge and Compass
Can't really find much reviews on this unit, but it interest us because it seems compact.
Compasses that are fairly flat will work only if held horizontal or nearly so, which is hard to do, particularly in poor visibility. Having the compass be part of the SPG limits how you can hold it and requires you to use a longer SPG hose.
Deluxe Pro Compass w/Bungee Mount and Cord | Dive Gear Express®
You can save space and weight by keeping the SPG hose short (26"), and using a wrist mount compass. You do not need a thermometer in your SPG because you have one in your dive computer. A small SPG is sufficient.
Thin SPG, Naked | Dive Gear Express®
Dive Computers - considering the Aqualung i300 wrist mount, thoughts?
Looks OK and reasonably priced. You could get an Oceanic Geo 3.0, which is what I have. I believe it's a little bit smaller.
Exposure Suits - planning to go with Carapace, thoughts?
My thought is that they're expensive. If you're hard to fit, you may not have any alternative. Over time most divers end up with several exposure suits for varying conditions, so consider the cost closely.
For warm-water dives I use a Neosport 3/2 wetsuit that cost under $100. I have colder water wetsuits the most expensive of which was like $300.
Fins - planning to replace our training fins with Aqualung Hotshots, thoughts?
My tastes run towards large fins because I find myself fighting currents and crossing large distances. Most divers choose smaller fins than I do, especially for travel.
I would avoid fins like the Hotshots that have a mechanical joint.
For warm water diving, you can use full foot fins that do not require wet boots. Less bulk and your gear will dry faster. Use lycra socks, or neoprene socks, to avoid blisters, and size the fins accordingly
Does anyone have any thoughts on the items we are looking for, better suggestions, more compact gear? What are we missing?
Fins, BC, and wetsuit+boots+gloves are ordinarily the bulkiest part of the gear. Not much you can do about wetsuit bulk so work on the other two
If you like the FFM, fine, but leave it at home if bulk is a major concern
You will want at least some safety items. Mirror, whistle, safety sausage, light