Seeking Headphone Reccomendation

Hi,

First off, I apologize if I posted this in the wrong forum. I couldn't figure out which one it truly belonged in.

I have gotten wonderful advice in the past here at Audiogon so I figured I would give it a try again. I recently moved into a friend's basement and it appears my room doesn't hold the sound in very well. I went up to the family above and could hear almost the whole range of my music slightly. I wasn't listening very loud either. So I was thinking I'd like to put some carpet padding on the ceiling to help hold the sound in the room. I'm wondering if this would work at all, or if you guys have any other suggestions? I wanted to go this route because I love listening to my speakers and it seems like it could be cheaper than a pair of cans.

If there is no viable solution to keeping more of the sound in my room than I guess I will have to invest in some headphones for when I want to listen during later hours.

My current set up consists of a Rega P5 (w/Ortofon 2M Black Cart), Fisher 400, and Klipsch Forte II speakers. I have been told that the Fisher 400 is a great receiver for headphones. I'd like to see what it is capable of. I'm thinking I'd like to keep my spending around $300 but could spend more if needed. I just don't want to reach the point of diminishing returns. I pretty much exclusively listen to rock, no classical or jazz for me for the most part.

So I guess I'm just curious what you guys would reccomend. I have done a little looking very quickly and it seems the Sennheiser 600 or 650s are very highly rated. I really don't have any expertise in this area so I figured I'd leave it up to the pros!

Thanks so much!
-Clipper