my 21 inch imac 2012 is running slow... im thinking if i should sell it and get a MBP 15 or latest imac .. i could sell it at S$850-900 but i have another option... someone is offering me to replace the HDD to 256 SSD at S$500 my question is... is the new SSD upgrade worth it? will it last me for another 2yrs maybe ? will there be a massive difference on the speed? my 2012 imac specs is core i5 2.5ghz , 8gb ram and 1tb hdd.. and another question.. if i change the hdd to ssd can i still transfer the recovery from the old hdd? the guy who wants change the HDD told me that HDD needs to be remove so he can put in the ssd.. i cant keep the hdd inside together with the ssd..