Do you have a budget for said upgrades? Because I'd say just grab a 390 and you'd be set
If you want to change up your case's form factor get a HAF XB Evo, it's a fairly neat case design
240gb SSDs are down to near 80 on some sales, so not too much cash to grab one, just make sure it's one that does 500 on the read/writes mushkin ones seem to be decent
Do you even need to upgrade? It seems that you just want to upgrade for the sake of upgrading. If you feel like everything still runs fine, you can just save the money.