First i like to thank for any one who reads this post and reply to it. As of right night i just want to get an amp that will give me a good sound out of my HE-500 and later on with in 6-12 month from now i will upgrade to a high end amp. I also understand that there are a lot of threads out there that are ask this same question, but in my case i got few different items that may make suggestions a bit different that they are in other threads. How i will connected my he-500: I will mainly will connect my he-500 to a laptop which is NP9150 which is a gaming laptop. Below you can see the system audio output for my laptop. This laptop has S/PDIF output in case there is a good amp that may require it over USB. I also own Astro mixamp pro if any one knows a good setup with that. As for the cost i would like it to be in $100 due this is a temporary amp but i can go up to about $200 range. NP9150 audio system output " High Definition audio interface S/PDIF Digital output 1 Built-in Microphone 2 Built-in Speakers made by Onkyo 1 Built-in Sub-Woofer External 7.1CH audio output supported by headphone, microphone, S/PDIF and Line-in Jack THX TruStudio Pro "