Importance of resistance (Ohms) in headphones

Good afternoon,

I'm a new bassist and this is my first post on TalkBass, so please bear with me if the thread is posted in an inappropriate subforum. I have a Squier P-bass with the stock pickups and a Peavey MAX110 amplifier, the chief elements of which are the trans-tube and psycho-acoustic effects, which can, in combination, give quite a nice low end for my very basic guitar and pickups.

In order to not annoy other people in the house, I've been thinking of getting myself a pair of appropriate headphones to plug into my amp. One of my friends has this pair of Beyer Dynamic headphones: http://www.guitarcenter.com/Beyerdy...losed-Studio-Headphones-102512019-i1126937.gc which I tried on my amp and was very pleasing to my ears. However, one slight problem was that I had to crank up the gain and the volume really high in order to make the music audible. My friend told me that this is a product of the Ohms in the headphones, and I would most likely want to reduce the Ohms from 250 (which is that model's resistance) to something like 80 (such as these: http://www.guitarcenter.com/Beyerdy...losed-Headphones---80-Ohms-272022-i1126935.gc).

I was wondering whether you guys think that this is necessarily true. Furthermore, let it be known that I'm not tied to BD as a company at all. Browsing through TalkBass forums I've also seen the Grado SR80E and SR80i as being good choices for a pair of headphones with deep low end. What I'm trying to understand here is how much the resistance is a factor that has to do with volume, and whether I should instead be focusing on other factors. Thank you.