I'm rocking a 13" mid-2009 MBP with 2.26 GHz Core 2 Duo. One year ago I replaced the original HDD with an 128 GB SSD and went to 8 GB RAM. At first I had considerable performance boost, but have been having some issues more recently. Bringing the computer up from shut down, sleep or out of a dead battery has become extremely taxing (takes 10 minutes to get apps running- lots of spinning wheels and bouncy apps, constantly killing apps and reopening just to get them up). Once I am up though everything runs relatively smoothly (still a little more laggy than you would expect with SSD and 8 GB RAM). The battery does need to be replaced- 1346 cycles + replace soon warning. But I'm wondering if the battery is my issue? Or is the 2.26 GHz too antiquated to handle OS X 10.9? There are also only 10.5 GB free on the SSD that could be an issue. I plan on buying an Air or new MBP within the year. I just want this one to be as functional as possible if I sell it or keep it as a secondary system. Any thoughts or comments on what I should do with this old girl are certainly appreciated.Thanks!