Great to hear you enjoying the system man. I know myself what a big difference having a dedicated Mono amp for the sub compared to running it on the bridged channel. The punch from the sub and the mids/highs from the Focals are a potent combination. I liked on the Rather Be song that there is a good range of frenquencies.
When you get it all sorted Kieran and you got 30-60min, you should look into using this test cd that I found to fine tune all the frequencies. I took nearly 1hr for myself but the end result was well worth it.
It's on my dropbox and you should be able to download it. It's recorded at a high quality and helps with sorting out all the crossover points etc.
Can't wait to hear and see the video