I found similar threads to this one, but none of them (of those I looked) answer my question. I would like you help selecting one out of the two following options: 1. On my MacBook Pro 8.1, Intel Core I7 2.7 GHz (Dual core) 8 GB RAM, with Snow leopard: I would like to change the hard drive from HDD (5400 RPM) to SSD (either Samsung 840 Pro or one of the Intel from the new series). So the computer will be faster. or 2. Buy a new Mac Book Air 1.3GHz dual-core Intel Core i5 processor Turbo Boost up to 2.6GHz 8GB RAM 128GB flash storage (specification taken from apple web side). I know the second option is much expensive than the first one. My current MBP is working great, I have no problems at all, but sometimes, I wish It would be a bit faster and I know the SSD would help. However, sometimes I also want I much lighter computer (I carry it with me frequently). Bottom line, I do NOT want to downgrade the performance!...Which option would you suggest? do you have a 3rd option? I was trying to find some Xbench or Geekbench values, but I am not familiar with those tests and I am not sure if they would be helpful to compare. My xbench value on my MBP overall is 180 (CPU=249, Thread=486, Memory=588, Quartz=336, OpenGL=154, User interface=529, Disk = 50). The Geekbench (free version on 32 bit) = 2591 (Single core) and 5241 (multi-core). Any help is highly appreciated. All the best to you all.