theres room for an intake in that old case - I can see the grill at the front plain as day.
Upto you but I personally wouldnt drop money on a new case for an old core2quad setup.
that aidos cooler will do the job straight away- its oos now though ,I did say to grab one straight away at that price!
If you really must put money into a new case this is cheap as chips & comes with 2x120mm fans.
http://www.ebuyer.com/725443-avp-el03w-viper-mini-tower-white-2-x-12cm-fans-usb-3-0-cas-7441?gclid=CjwKEAiAjfq2BRDpmdHmssaW5xsSJABToP4lglaWuoF8Sw9K7bLuIgCgxIYraVq15b3GGa-vOomEgRoC3UXw_wcB#fo_c=951&fo_k=c967f7c5deb6f7e8d45fe598d8d36258&fo_s=gplauk?mkwid=s_dc&pcrid=51482418059&pkw=&pmt=
apart from the fact it has 120mm fans rather than 80mm its not a great step up from what you have.
now youve missed the aidos deal consider the s40 instead.
http://www.amazon.co.uk/DEEPCOOL-Computer-Radiator-GAMMAXX-Auxiliary/dp/B00HXH8TAG/ref=sr_1_1?ie=UTF8&qid=1457469557&sr=8-1&keywords=deepcool+s40
IM running an i5 3470 on one of these & its not seem above 52c under prime stress testing.
Its middling build quality at best but for the money incredibly impressive value.