The Vulkoras Desolator is probably my favourite, nice look to it and also pretty menacing unit once you get the phase missile tech up. I love the look of most of the Vasari except the space whale.

For practicality I'd have to say:

1. KOL!!! (Its odd, but this unit surprisingly was my turning point in a couple of my games… in a big way)
2. HC in general
3. Any unit according to the situation (some more so than others… but I don’t feel like going into it now)... discluding support carriers... ' self explanatory

For looks (in the Cap department, for pratical reasons):

1. Halcyon Carrier (defiantly, it’s certainly a neat design... although its phyllic-esque... *meh* you could say that for most ships... But its certianly unique in design when compared to the other ships)

2. Radiance Battleship

3. Vulkoras Desolater

4/5. A toss up between the Kol Battleship and the Kortul Devastator.

I'm sure there is another thread like this somewhere... *meh*