Well it depends on your budget and musical tastes. As several have ststed the Sennheiser 600 is a good phone, especially for classical and Jazz. The 580 are significantly cheaper and give you probably 80-90% of the 600's. Both of the Senn's sound much better with a dedicated headphone amp. many people like to mate it with tube electronics such as the MF xCan'x v.2 and ASL MG Head DT.
Grado Labs phones are very good especially for rock music. The 225 and 325 models are very good at a comparable price-point to the Senns. All Grado's are low impedance phones so can be driven without a HP amp, but do sound better with them. Some consider the 225 and especially 325 to be bright phones.The wooden Grado's, the RS-1 and RS-2 have a more mellow less strident top end.
You may also want to check out Alessandro Musucal products. They sell a line of the Grad's that have been modified for professional use. They tend to provide a little more detail without increased harshness. Their MS model I is similar to the Grado 80/125, MS model II to the Grado 325 and their MS Pro is a Grado RS-1. I actually own all of the Alessandro phones and so can attest to their musicality.
You can see the Alessandro products at: http://www.alessandro-products.com/main.html
Another set of phones that are a very good bargain are the Sony V6/7506 model. These are very common as monitoring phones and provide a very detailed presentation and are relatively inexpensive. They also fold up nicely, are built like a tank and also present a low impedance load. Thus they are quite nice for portable use.
Lastly you should go to:
http://www.head-fi.org
and ask your question there. It is full of a group of the most knowledgeable headphone geeks on the planet. Happy listening.
Grado Labs phones are very good especially for rock music. The 225 and 325 models are very good at a comparable price-point to the Senns. All Grado's are low impedance phones so can be driven without a HP amp, but do sound better with them. Some consider the 225 and especially 325 to be bright phones.The wooden Grado's, the RS-1 and RS-2 have a more mellow less strident top end.
You may also want to check out Alessandro Musucal products. They sell a line of the Grad's that have been modified for professional use. They tend to provide a little more detail without increased harshness. Their MS model I is similar to the Grado 80/125, MS model II to the Grado 325 and their MS Pro is a Grado RS-1. I actually own all of the Alessandro phones and so can attest to their musicality.
You can see the Alessandro products at: http://www.alessandro-products.com/main.html
Another set of phones that are a very good bargain are the Sony V6/7506 model. These are very common as monitoring phones and provide a very detailed presentation and are relatively inexpensive. They also fold up nicely, are built like a tank and also present a low impedance load. Thus they are quite nice for portable use.
Lastly you should go to:
http://www.head-fi.org
and ask your question there. It is full of a group of the most knowledgeable headphone geeks on the planet. Happy listening.