PV1 all the way, it has won the What HiFi awards, they said there is 'nothing' wrong with it, the monitor audio is a beast, but the bass from the PV1 is higher quality (My personal opinion). With the PV1, you may not get the most bass for your money, but the sub has great timing, it's lean, low, fast, and fantastic. The Monitor Audio is good, but the PV1 has the edge!