Hi all, I have a 15 inch Santa Rosa MacBook Pro (3,1) with 4 GB RAM and 120 GB/ 5400 rpm stock Fujitsu hard drive purchased in October 2007. I am now celebrating its 3rd birthday and the end of Apple Care without any major problems (Apple replaced a power adapter and battery about a year ago). This is the model with the GeForce 8600M GT graphics card that is prone to early death but Apple has promised replacement within 4 years of purchase should it fail. I have had no symptoms of failure and run smcFanControl at the higher RPM settings and have noted only moderate temps with Temperature Monitor. Although everything functions OK for my needs (mostly web browsing, email, YouTube, itunes), it does feel sluggish from time to time with more intensive tasks. The hard drive has plenty of free space as I move large and less used files to an external hard drive regularly. I am considering putting a little money into upgrades: changing out one of the 2 GB sticks for a 4 GB stick ($108) and changing the stock Fujitsu hard drive for the OWC SSD ($270). I would do the upgrades myself as I have some experience opening laptops. Would I likely notice the difference? And would this be value for the money ($400) in a computer this old? Alternatively I could sell the MacBook Pro (net perhaps $750 on eBay) and put the money towards the 15 inch MBP low end i5 refurb ($1529) What would you do and which would net me the best performance overall? Thanks for your comments and advice.