I went with Taylor 8mm (from the GP Store). They come in various colors and are good performance wires. You may also go with the OEM or Accell. I would not go with anything smaller than the 8 mm, though. The Taylors are pre sized for our engines and are heat resistant.
As for price, I don't remember how much they were--$35 sounds about right. Don't let anyone else do your plug wires for you. It is an easy swap--especially since you are probably running an NA 3800. Just remember to change one at a time.
As for plugs, I would recommend the Delco platnums. They are designed to go 100,000 miles between replacement. They are around $6 a piece, though. Well worth the money considering that you shouldn't have to worry about them for a long, long time.
Retired Moderator, The Bonneville Club www.bonnevilleclub.com
RIP Oldsmobile, April 29
1995 Bonneville SE Supercharged (Stock)
Current Mods: Dirty GYM Sock air freshener.