Originally Posted by GloryUprising /img/forum/go_quote.gif
In terms of sound quality, they are also very different beasts. The HD598s are much more forward and the sound stage is much bigger in both width and depth. While the Momentum is more intimate. Both share the standard Sennheiser mids, but they are less apparent in the Momentums due to the more aggressive bass (but when you EQ the bass down, the mids are very there). Pace and layering is about the same (but then I don't really use my 598s much for music after I got my HD650/LCD2, so I'll have to double check this).
Would I recommend them for a new audiophile? Yes, it's a great place to start, albet a bit higher price point then most new comers may be comfortable with.
Would I recommend them for a stationary home rig for the rest of us? No. For most, there are better options for the price. For a bass head, possibly.
Would I recommend them for a portable can? Definitely, the market for circumaural is very limited in the context of a portable can.