I have played the Bergantino 1x12's, both the EX112 and HT112, and both are excellent. Not as ultimately transparent as some cabs, but much more balanced than others. Full low mids, chewy upper mids, and smooth high end (talking about the HT112, here). I am fortunate enough to have used a number of really nice cabs, and in the small cab arena, here are some that I can recommend from first hand use.
In the "uncolored", "accurate" camp, I really like (in no particular order):
EA VL-series cabs (VL-108, VL-110, VL-208)
EA CxL-110, CxL-112
EA Wizzy
Accugroove Tri 208
Accugroove Tri 110
Hevos Midget
The Hevos I actually bought off of Ray, and while I am head over heels in love with it, apparently it did not work out as well for Ray. So, this certainly highlights that different gear combinations, in different settings, with different players = different results (duh!). Plus, personal preference is quite variable, as well. Of the group of cabs, above, I should point out that the Wizzy offers tremendous tone/volume for its size/weight. Like Sam, I absolutely love the VL-208, but it is not a lightweight.
In the "slightly colored" camp, or "cabs that have their own sound, but still let the instruments shine through", I can recommend the following:
Bergantino HT-112
Epifani T-112
Epifani T-110UL
Raezer's Edge Bass 10
Ashdown Mini 10T
Both the Ashdown and the Bass 10 are somewhat limited in the lowest register, and as such, I don't recommend them for 5-string electric, but on a 4-string doghouse, they sound quite nice.
Another brand of cabs that I do not own (yet!), but which are very promising, IMHO, include the 2x8's and 3x8's made by Low Down Sound. Don Oats is quite an innovator, and really makes some great cabs.
I have tried the PortaBass cabs, but they just didn't float my boat. Again, that may be just me, my fingers, my gear, and my preferences. I have also tried the GS112, and I liked its full low-mids and its clear high end, but I found it to be somewhat scooped in the upper mids, and the lows and highs sounded kind of disjointed to me. But, see above for disclaimer.
Another cab to consider is the ACME Low B-1. I have a Low B-2, and it is a great cab. The ACME's do love power, but your Focus should be able to deliver, especially if you get a 4 ohm Low B-1. The Accugroove Tri 112 is another killer cab.
Hope this helps, Tom.