1, I agree, but I think you still need to be careful with the amount of EQ you use. 2, If I get it right, you agree with me here. The higher-end gear you have, the less ketchup you need. Ketchup can be anything else in this example, not necessarily just bass. 3, You are right, price/performance ratio can be very, very different. Some £500 gear can sound better than some £2000 gear. But this is a sensitive ground to step on. In general I think we can say a £2000 amp will sound better than a £500 one, however there are some exceptions. It also very much depends on personal preference. 4, My sun-roof example is not perfect. Like any other examples it just gives you a starting point. All I am saying is, it is better be careful with EQ. It is very easy to overuse it.