I have been talking with a few people on the iceworld server. They obviously like the iceworld style maps. But would like to maybe have a little more variety. They were saying possibly a couple from the turbo server. I would like to also suggest giving fy_twotowers a try as well. It was a very popular map a while ago and is still one of my favorites.
If not completely commit to adding them into the rotation you could just have them as an admin option.
Also, although itself is a good map. I dont believe it a very good fit for the iceworld server. The Batty Sanctum map. Every time it comes up there are alot of people wanting to RTV it.