PB12 and PC12 offers good bass.
PB12 is front firing, front ported and requires more space on the floor compared to PC12 which is down firing and top ported.
SB12 is sealed and little less powerful compared to other two, but more accurate for music. I suggest SB12 if your usage is 60% music.
Audire (Coimbatore) is a dealer for SVS for long time.
I received a quote from them 6 months back
SB12 - 46k
PC12 - 55k
PB12 was not available at that time hence I didn't get the price - may be around 60k
I saw in the forum someone mentioning that there is a new dealer in Bangalore for SVS.
Importing Sub is risky, if something goes wrong. You will have to spend on sending it to US.
Or you will have to try local repair options, they may not be able to repair in some cases - again risky, warranty will be void