Straight from the Temporal Cold War, the Xindi Aquatic Cruiser!
A quick look at the named and non-named ships:
Now on to the upgrades:
The Escape pod is quite useful, allowing a discarded crew member to be passed to another ship upon its destruction.
The next set of upgrades:
Next up - the Xindi generic captain:
... Well. On to the next captain:
As a quick cross-faction build, for a single ship try this:
I.R.W. Valdore 
- Kaiphet Amman'sor 5 (Captain) 
- - Counter Attack 
- Mendak (Admiral) 
- Tom Paris 
- Amat'Igan 
Ship Total: 50 SP
Stay cloaked and this would give you 8 defence dice with battlestations and re-rolls on the blank dice. There are not too many build that could even hurt this ship consistently. In the current state of play that would still give you 80 points to play with as well... nasty. I'll have to get hold of Tom Paris and try this out.
So to sum it up - a very nice expansion with some interesting cards, I think the ship looks fantastic and a 180 arc is excellent as it can pack a good punch. Brilliant ship and I can't wait for the retail release!