Excellent choices; even the rosewill will work fine. For swapping out internals, draw some diagrams as each case connection pins are a little different. Leave the power supply out and tie the case connections out of the way. Line up all the case standoffs with the motherboard mounting holes, and remove any extra standoffs that will touch circuitry and don't line up with the holes. And don't forget to install the backplate first, a common mistake.
If you are not experienced, I suggest you take some photos of where things are attached before taking things apart.
Take the time to read your case manual and motherboard manual. Download them from the web site.
Some Dell motherboards are non standard, perhaps BTX. verify that yours is a standard M-ATX.
That's a nice case; if it's still in warranty, I would leave it alone. Check for a fan slot in the front or back for additional cooling. The front case pin cluster has no documentation, so matching the case connectors may be a pain. But at least the board is micro atx.