...Hmmm, 10ebbor makes a good point, so I'm changing my vote to the Valhalla. As for the next turn, I just got a brilliant idea for something offensive:
XSR-1 "Valkyrie" Fighter
Desired Volume: 200m³
Team:Us, Mark, Anton
Time: 2 Months
Description:Basically the smallest ship you can get while still having a fusion plant, engine, weapon, and cockpit, the Valkyrie is designed as a one-man fast escort and antishipping fighter. While not very durable at all(it barely has any armor), this rough hexagonal craft is extremely fast and maneuverable, making it very hard to hit in the first place; and thanks to its micro-fusion plant, it can easily accommodate the power requirements for a single spinal-mounted frigate-class heavy laser. It also boasts good range for a fighter, able to reach from Haven to the TR-12 III astroid belt and back(though this is pushing it a little). While it has some atmo capability(which allows it to be launched from the planet), it is mainly for use in space, as drag and friction can cause unacceptable heat/load stresses at top speed.
Priorities:1 Maneuverability, 1 Laser output, 1 cheaper materials(using ceramics and composites whenever possible), 1 efficient powerplant(reduce size), 1 efficient engine(increased range and overall faster)
And since this would finish about the same time as the Valhalla(IIRC), We could get started on something that'll be the perfect companion:
Name: HYR-1 "Freya" Parasite Corvette
Team:Everyone
Volume:3000m³
Time:4 Months
Description: The Freya is a small-to-medium, roughly elongated diamond-shaped corvette that acts more like a pocket carrier, as its purpose-designed quick-release cradles allow it to carry 5 Valkyries(which make up about one-third its volume!). However, it still allows a fusion plant, engine, support for the crew of the fighters and mothership, as well enough maintenance and fuel for extended missions. This, however, doesn't leave it with very much room at all for weaponry; in fact its only weapons are exactly 2 light laser turrets, one topside, one keel-side(they do, however, between them have full coverage), the lasers are just about powerful enough to be a threat to anything roughly the Freya's size, but anything larger and it would have real trouble penetrating armor., though the rate of fire does allow them to double as point defense weapons The Freya does have some armoring as well as decent agility and speed, making it surprisingly tough.
Priorities:2 Improved Stowage(for the supplies, crew, fighters, and cradles), 1 Maneuverability, 1 composite armoring(increasing armor while not increasing mass too much), 1 AI Targeting(for point-defense mode on turrets)