Headphones--The Grado sound in a closed design?


So, finally purchased a pair of Grado SR801's...I have to say that I am blown away by the sound of these cans. Recording and playback sound incredible! However, the open air will unfortunately limit me from using these out in public. So, which cans have a sound similar to the Grado, but a closed design? I know, pretty much impossible to answer that...Trying to stay less then $150...looking at Sennheis, Ultrasone, AKG...any help appreciated...thanks.
pablo16
No solution for the closed back but if you're interested in improving the 80i, buy some G-Cushions like the ones on the GS and PS1000i. Makes my 325i sound like the top of the line.
very cool...thanks for the response...unfortunately I might have to let the grados go depending on the headphones I find...I've read a few things stating the ultrasone line has a very open feel although closed back...it's a shame that I might have to rid myself of these, cause they are just amazing for the price
I also like the Grados, but dont want an open backed phone.

Audio Technica has been recommended for a more reasonable price, but I have not yet compared my Grados or Sennheisers with Audio Technicas.

I dont want to disturb my family if they are sleeping, the passenger next to me if I am traveling and I dont want anyone in the gym knowing what music I like.

What is the benefit of open headphones?