1) Plugmold comes in a variety of lengths with receptacles on 6"/1'/etc centers. Check at your big box store or electrical supply house to see what they have in stock. 2) If the wire comes down from above, you will need to cut the wall open as it is most likely stapled to the stud if it was installed during construction. If it comes from below, pull it back down, drill a new hole from the basement into the wall. You will then need to fish a new piece of wire up the wall, poke it out where needed and install a junction box in the basement. Either way, you will probably have to open up some sheetrock. The back of the cabinet should cover any cuts you make. Yes the cable should stick out within an inch or two of the end of the plugmold. Another alternative would be to move the cable up to a two or three gang box at the proper height, have the cabinet guys cut out the opening in the back of the cabinet and install a couple or three duplex receptacles. If you should decide to change the use of the cabinet in the future at least you would have flush devices. With the plugmold, you probably aren't going to get more than five or six single outlets anyway. If you use the existing box as a junction point, the cabinet makers will need to make provisions for it to be accesible.

kswl: I'm glad to hear it's working well for your DS with the narrower width. With technology changing at such a fast pace and getting smaller and smaller some of these special purpose goodies become redundant. We're opting to skip the CPU cabinet for that same reason. I am putting in a keyboard pullout for me, but not my DH--he wants a pencil tray, but you make a good point about having to scoot out. greenmtn: I agree with that. We do like to open the windows as it brings in a lovely breeze. Lucky we do not get too much direct sunlight as our neighbor has a huge ash tree in his backyard that filters the light without completely shading the room. Tomorrow I will meet with the designer who did the above design. One difference between her design and that of the designer I met with yesterday is the amount of space for seating under the desk and cabinets size. The other designer has more cabinets and less foot room under the desk--which I like, at the same time it could prove annoying. I am also thinking of reducing the depth of the right most upper cabinet to 9" as I don't want to obstruct the window. I am wondering how to treat the upper actually. Do I center it on the wall (which is 33") or line it up so that it ends at the same place as the lower does? If I do the latter it seems to look funny to me -- not centered. If I do a larger cab. and bring it closer to center then it gets closer to the window too--hence why I am thinking of doing the narrower depth. I think I can still store many things there--paper, CDs, smaller books, etc. Hopefully by the weekend I'll have designs from all three. I want to get a custom cabinetry quote as well as I feel the cabinets would be better quality. These three places all specialize in garage/closet/office but the product is all melamine based. They are designed to have minimal backing and they do all the wire management to get power where we need it and hide all the cords. It's a start!

Some concepts I’ve toyed with. I’m just not great with scale or conceptually what is enough walking and sitting space.

"I could consider facing the slider. Perhaps I could build the desk so that it is T shaped along the wall with the window and I could sit at the desk facing the slider?" I think this is your best solution. That way, you have the view of the outside, but the monitors aren't floating in the middle of the room. To me, I think your best investment is a larger desk. Built-ins are great, but technology change each day and we are using less and less paper with more stored in our computers. You have that closet already, where items (including your printer) could be stored. Also, consider how long you will be in this house. Will a future owner want to use that space for a bedroom, for example? Best to keep things flexible. On the other hand, if you really want built-ins and have the funds, then go for it. But, the way you wanted the desk arranged in the beginning, the monitors will be floating out in the room. No horrible, but something to consider.