Stacking components?

I have a Sony 7700 and am getting a Jolida 1501. Is it OK to stack the Jolida on top of the Sony? Both will be going in a heavy wire 18"x18"x74" tower/shelve unit. The tower will have good contact with the floor and I was going to put a slab of granite, wood, etc. underneath the Sony as well. Also, I was going to use something like Vibrapods underneath both the Sony and Jolida to help with vibration even more. I've heard/read that a small bag of sand or other weight on top of the CDP will help some. Can I combine this effect by having the Jolida on top of the Sony or will heat be an issue? Any other ideas for cost effective isolation in this type of setup? I realize the wire tower isn't perfect for this but it fits where I want it in my den perfectly and it is well made and solid. Here's a link to it(bottom/middle of the page):
http://www.125west.com/InterMetro_Home_Office_Furniture_Metro_Dorm_Sale_wire_shelving.html

I'll also have a small 5 gallon mini/nano reef on the bottom shelf and a 14" Toshiba television above the components. I'd like to try and get it to work well with the components in there if I can.

Thanks for any input.