I have some Boston Pro's 6.5's. For about 4 years I ran them with 100rms per side, just recently I upgraded my subs and put about 300rms to each side(600rms total)
...All I can say is wow...The highs are clean and crisp like said previously, I listen to Hawaiian music mostly and the strums and strings come across very very clear. The midbass kicks pretty hard, but its probably due to the amount of wattage thats going to it, but most importantly its clean and clear. With 1100rms going to my subs now, I thought I would have to get more of a front stage, but I was mistaken. I bought them for 375 back in 2000, outlasted everything else and they're still going strong. Best **** money I ever spent on components.