Case upgrade for Dell Inspirion 3847

Hello,

I wanted to know if it is possible for me to change out computer cases. I desire to use exisiting parts from my dell computer and transfer them over into a Rosewill Challenger computer case?

I've recently begun upgrading my computer little by little, and came to conclusion that my computer for the most part is great in terms of components, I just need to upgrade the psu to a evga 500w and two team elite 4gb ddr3 133mhz ram to equal 8gb. I've have seen the motherboard inside when installing the Zotac GT 630 Zone Edition ddr3 1 GB 902mhz last saturday, it appears to be of normal standard size, but I will like to verify with someone else here if the intel h81 motherboard is standard or custom in size.

I plan on doing the installation myself and have taken all the precautions in preparation as I did with installing the after market or off the market nvidia gpu. In short, will I be able to upgrade the case which is a mid tower atx form factor from Newegg,or will it not be possible. If not then I ok, with going ahead next payment for the psu and ram to finish out the build upgrade.

Below is the link to my computer and components I desire to purchase as upgrades.

PC Specs found from Best Buy - http://www.bestbuy.com/site/dell-inspiron-desktop-4gb-memory-1tb-hard-drive/5859014.p?id=1219165153058&skuId=5859014&st=g3240&cp=1&lp=2

Rosewill Challenger from Newegg - http://www.newegg.com/Product/Product.aspx?Item=N82E16811147153&cm_re=rosewill_challenger-_-11-147-153-_-Product

EVGA 500W from Newegg - http://www.newegg.com/Product/Product.aspx?Item=N82E16817438016&cm_re=evga_500w-_-17-438-016-_-Product

Team Elite 4gb ddr3 1333mhz from Newegg - http://www.newegg.com/Product/Product.aspx?Item=N82E16820313097&cm_re=team_elite_4gb-_-20-313-097-_-Product

Total with case comes out to less than 200 total, without the case being involved in purchase the price will be even less.