I have no idea if the 1000 sounds like the 7000? But a lot of people say the HP700 has a very close sound. I had the HP700 awhile back and it was really good sounding. Comfort was an issue for me so I gave them to my son, which he broke them shortly after.
I still say the D1000 is (WAS) the best sounding can under $150 hands down. It's still my go to can.
The Cal is very close in sound, but the Cal's slightly deeper cups and different cable make it sound a little different.
It has a looser Bass tho slightly deeper. Everything else mids/highs are to close to call.. I notice the bass the most.
The 1000 just having less but tighter Bass. You can see why the Cal is recommended a lot. For the price it's really hard to beat, It just has a pleasing sound for not a lot of $.