Hello, I am looking for a case and keyboard cover for my new rMBP. However, I have some concerns over heat dissipation. Will there be an issue with the heat if I put a cover over it? If not, can any of you recommend a case (not a sleeve, but a hard case) and a keyboard cover, please? BTW, I have the mid-2014 15.4" rMBP. Thank you in advance for your response!