I also use a 2.53 MBP, I use LR and I don't find the UI to be too bad at all. I've never used Aperture...
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2013 BMW Z4 sDrive35i|DCT|M-Sport|iDrive|Premium Sound|Heated Seats|Comfort Access|PDC|Deep Sea Blue|Cream
[At the port of exit awaiting a shipping vessel since 8/17/12]
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