I am looking for a new notebook to replace my 3 year old 14" DELL, which is literally breaking apart Currently I am running Ubuntu with the occasional Windows Session. I do Web development 90% of the time on my current machine. (no Design stuff, nobody would want me to decide what things should look like ) A recent change in company policy requires me to have my project related stuff encrypted. Now my question: What difference would there be in day to day work between the i5 and the i7 in the 13" MacBook Pro using Encryption? (Running an IDE..sometimes two instances, Local Webserver, 2 - 3 Browser Instances with up to 10 Tabs each, sometimes a Windows VM) The i5 is missing the AES Instruction Set and I read in some other threads that this might influence the decision between the i5 and the i7? I understand that the current MacOS does not support the AES instruction set on the CPU? Ist that correct and will this change in the future? (Lion?) I am quite new to the MacOS World and I am still reading up on stuff to make a decision whether to make the switch As for the basic decision to go with a 13": When working productively (programming ) I will be connected to an external 24" Screen about 80% of the time. I will still be carrying the notebook around with me a lot (usually daily), so portability is a key requirement but "on the road" I normally do not do any heavy programming...just reading/writing documentation, emailing etc...screen estate will not be as important for those tasks. Is there anything that speaks against a 13" with this usage scenario? With the current 14" 1440x900 I do not havy any problems screen wise (like mentioned: I am mostly on an external screen)...but I am still a bit torn between the 13" and the 15". After checking both out in the store I must say I love the size of the 13"...just asking whether there is some downside to the 13" which I am not seeing right now? Finally, I do like to game occasionally but usually older and not very demanding stuff like GuildWars with friends every once in while or Neverwinter Nights etc. I take it that the HD3000 should be way ahead of my current Quadro FX360m? (Which to my knowledge is based on a 8400m...) Thanks for your help!