Hi guys, So, without using an amp, I am pretty happy with my Sennheiser HD598. If there was anything I'd want extra is maybe more depth (bass? ) to the sound thought I'll take clarity and soundstage over bass any day. Being a person who always wants to know what's better available out there, I just can't stop without hearing the sound of headphones like HiFi HE-500, HD650, HD800, LCD-2, etc I always see you guys drooling over those models At the same time, I am not the one who spends double to get just that extra 10% improvement in quality. So ... my question... 1) Will those other models be so much better than HD598 that even a non audiophile will hear a difference? and 2) What amp (not too crazy expensive) will be good enough to allow those headphones to reach at least 80% of their ability and be fair enough to compete against HD598? I'll order this stuff today. any feedback is appreciated. thank you.