definitely nothing wrong with the reference/performance range. I run the reference set myself, and enjoy it immensely. heard the performance too, was very impressed with it as well. The L18 is more of a budget driver, being a lot cheaper, and unlike the reference/performance is a DIY driver, so it does suit some people better. Personally i would like to make the jump to 3 way one day and when i do, the L18 will be the first midbass i try.