I'll post tomorrow the part number for the switch.... mine had bad LEDs too, and I replaced that. It requires taking off that far right case cover, but HP has some instructions on that.
Good choice on the SSD.... I'd get the 300GB one instead, however. Basically you double your SSD space for a little extra money, and the larger size ones do have a bit of a speed advantage. A key thing is that with the Intel SSDs you get to run their Intel Toolbox software, which is free and excellent. There is one setting it will advise you to change from stock, and I set up a TRIM event to be scheduled through that software once per week at a time I'm usually going to be using the box so it is not in sleep mode.
That is the 2.5 to 3.5" form factor converter you want. The Foxconn "BlindMate" receiver is what is meshed into back in the depth of the drive bay. The male end is on the item you are getting, and it is Foxconn BlindMate too. Can't do better than that, and made by HP.
The newer Z620 and the older Z600 sliders have different part numbers but work fine in each other. I'll get you those two part numbers tomorrow too. Whichever is less expensive is the one to get.....
Remember Dan's advice.... matched memory sticks in all 6 slots is the best. 6x2 or 6x4 is what I'm running.
