Six years and just over 50k miles ago I did a Cap, Rotor, Wires and plug replacement on my 1994 GMC Suburban, everything was bought from Summit racing:
1) The plugs are NKG R UR 5 V-Power
2) The Cap and Rotor were the "Blue Streak" set with brass terminals
3) The wires were the Summit brand 8mm Low Ohm .
This unit is mainly used at highway speeds ( 60 - 70 MPH ) with very little ideling or city driving. Also, when I checked the gap on the plugs I pulled, 4 of them were gaped at the factory setting of .043 ( straight out of the box ) and the other 4 were gaped at the under the hood sticker recommendation of .035. ( the best I can figure is I did one side by myself when I was paying attention and the other side when someone stopped by to bullshit ) but at any rate the side with the bigger gap had a lot more crusty deposits on the insulators and tip. the side that were gaped to the factory sticker look a lot better with hardly any deposits at all.
The cap and rotor looked like crap and I figure I am very lucky it did not leave me set in the middle of the road. When I pulled the coil wire off, it literally pulled the terminal off with it. There were a LOT of debris on the inside of the distributor and on top of the rotor.
The wires looked to be in great shape, and If I had not tore a couple of the boots with a pair of needle nose pliers trying to get them off, I would reuse them.
Here are the pictures so you can Judge for yourself :
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