Ha ha, and here I thought I was finished!
Okay, having (re)read a bunch of stuff about the processors, I'm going with the 4770K - supposedly for some people the 4771 has better security, but for mortals like myself it can actually make security more complicated. I have enough complication already.
I looked at the Gigabyte motherboard, and while it might have more connectivity than the Asus, I think the Asus has enough for me (yes?), and the latter also has a couple of features I like the look of that the Gigabye lacks: a button to give you access to the BIOS (or UEFI or whatever it's called now) despite blink-of-an-eye boot-up times, and the debug LED display that tells you what isn't working (I see I called that "degug" in an earlier post - sorry). I will get the Expert version of the Asus Z87, though, to get Thunderbolt.
I confess I had hoped to live my entire life without finding out what a RAID really was, but I researched it and I agree. I'll get a second HDD and do a RAID 1.
Nobody suggested I should get two 256GB SSDs instead of one 256GB and one 128GB, but I'm going to anyway. Anybody think that's a bad idea? One will be for OS and programs, the other for LR catalogue, PS scratch disk, etc.
Since I'll now have two HDDs and two SSDs (and maybe I'll add a third some day), maybe I'll stick to the XL Black Pearl case, rather than the non-XL one.
Somebody pointed out to me that on the Intel site, for the i7-4770's "Memory Type" it gives "DDR3-1333/1600." What, if anything, does that mean for my choice of RAM (G.Skill Ripjaws Z Series 32GB (4 x 8GB) DDR3-1866)? It says the same for the i7-4771, btw. Should I get the 1600 version of the Ripjaws instead?