Good luck with what ever option you go with, just remembe we are trying to be realistic about this and give you good choices. Just dont want to see you get something and spend that much money and not be happy, keep us posted as to what you get and how it works out.
HAHAHA!!! No way the MT did a 146.3 with the 4 channel PA. If you'd notice, I am currently on the hunt for a new sub amp, but at the time, I had (2) PA 3000Db amps on my MT. Like avs20 said, SQ is totally subjective, but my personal opinion is that I couldn't have made a better choice for my type of music. The MT is a badass sub.
I don't understand why so many people want to run an MT daily. I guess just the notion of bigger or more expensive must mean better performance. The XXX will be a much better daily sub, good choice.