You can use all the used filter media either the pad or ceramic even both!! Your decor and media both have BB so is move that over tithe new tank. Also I'd add half old water dose Prime and then add fresh water. With the new substrate you won't stir any gunk up so you'll be fine. If your gonna use fine sand like Jess I STRONGLY recommend egg crate. Here's a pic.
http://www.homedepot.com/buy/building-materials-plexiglass/24-in-x-48-in-white-egg-crate-lighting-panel-5pack-151888.html
Or you can do your aquascaping first then add the rock so I they dig which they will you won't have a collapse. Sump looks awesome you'll be very happy with that setup. Looks to me like you really don't need any help at all.
Cichlid stones are awesome IMO
http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=21383
I have a bunch. I'm also a HUGE fan of Anubias I have over 30 in my tank. I've glued them to rocks, driftwood pretty much anything. I've also planted a few but every now and again my misfits will dig them up. I just love the look of a natural setting. I however am not a fan of sand... Yes I said it. I use a mix. The base is Cichlid sand an the top is small natural gravel. It works for me.
I also believe on overstocking with Africans to help cut down aggression an also I like to break up the line of sight with tall driftwood pieces am Anubias glued to it. Seems to work. I run a fx5 and a AC 110 with just the sponge and polishing pads to filter out the micro junk.
I have a Solarmax extreme with ATI bulbs. I have to Rena 300 air pumps running 2 air stones.
Here are a few shots under the new bulbs.