Right now I have the 2.16GHz 20" iMac which is about 2.5 years old. I already started to experience some hiccups using some programs and considering an upgrade to get rid of the hiccups. The days I have been using the iMac I always wished I bought an higher end mac. I don't mind paying $2500 for the new higher end iMac w/o SSD and ram upgrade but was wondering if the 27" i5 would suffice? as I come from a core 2 duo 2.16GHz machine?