I have just been given a wonderfull set of HD25's from my girlfriend for my birthday last week. i needed closed headphones and something that was pretty much universal. When i first plugged them into my Arcam AVR300 amp I thought they lacked deffinition. I was told that i should play them for up to 50 hours 1st. I did but was not really impressed until i plugged them into my laptop and WOW! I was blown away but it could be smoother. Now i know that the headphones run at 70 ohms. I'm not sure what the laptop ouputs at but after checking, my amplifier puts out 300 ohms through the headphone socket. i have figured that the best way to get decent sound to my cans from my hifi system is to get a seperate headphone amplifier. I have everything connected via my AVR amp and would like to use this as the main source. The question is, what headphone amplifier would people suggest for me to keep the similar soft & smooth sound i love from Arcam? i dont want to blow much, maybe up to £150?? Any help would be greatly appreciated.