If you can, go ahead and get the AC
110 and run it in your tank until you get the new one set up. Then move the AC
to the new one. I did that with my 10gal and moved it to the new 37gal and cycled in 1 week. Also moving anything from the established tank, plastic plants, substrate in a stocking or anything will help. Or if you have to wait to get the new setup all at once, then yes you have a good plan. If you run 2 sponges and the Bio-rings, you may have to trim the sponge down in height some.
Sounds like your reading the right pages on your research.