Darkfox - Yes, the Blueline has built in transformers...while the gold sierse does not.
It depends..if you can mount them so they don't look gaudy (so you don't see the tube) then that would be fine.
The only thing i would worry about, is if they are different color blues.
Snowbd2u - i have Street Glow 12" Gold Series replacement neons in my wheel wells. I have a seperate transformer powering them. As for getting wire, i bought extra 10 gauge wire, and ran the wire under my car (away from shiz) and its been working for months nwo.
Carl