Is there a way to run computer sound through an E7/E9 combo?

Title. If I bought them right now they would plug directly into my motherboard which uses some Realtek audio hardware. How much of an improvement would I see with an amp? Right now I have an E7, I'll probably end up getting the E9 down the road if it makes that much of an improvement.

For progressive house (Deadmau5), rock (Foo Fighters, Jet, Cage the Elephant), and a LOT of gaming (PC, all genres), would modded HD555's be a good match? These seem like the best value for around $150 as they essentially become 595s, but maybe there is a better match for me? I like a good...

I'm looking for some new headphones for primarily gaming, I have a Fio E7 and can pick up an E9 later if I need to.    My question is really - should I buy the HD555 or the Brainwavz HM5. I know that these are pretty different headphones, and I mostly listen to rock/alternative. I would...

Mad did you ever get a chance to try out the Ultrasone Pro 900s? I've been trying to decide between Ultrasone and Denon for a new gaming headset + mostly rock music, and was hoping you had tried both.

The amp only has a single button on the front (power), the preamp is where the headphone jack is located. It says Stereo Amp, not sure if it is the older version of what you have there?   The bottom piece here is what I have, along with a larger version of the middle one (three rows of the...

He left me some Rotel gear -    855 CD Player 850 Preamp / Radio 870BX Amp   I'm not sure if I could use these for headphones, I think there's a jack on the front of the preamp. Should I keep this equipment or look for something else. I have some Sennheiser HD515 headphones and...

I forgot to add, I'm mostly a gamer, but I also really like to listen to music, so if anyone could recommend a cheap mic to go along with their headphone suggestion, that would be great. Thanks to all who replied already, I don't know if the gaming comment would change anyone's previous suggestions.

I prefer not to have open-backed headphone because I'm normally in the room with two loud people and its hard to hear. I previously bought the Sennheiser HD515s, but I built a new computer and don't have a proper sound card in this one (the motherboard audio ports have a hard time powering the...