IMVHO, Gibsons custom shop delivers a pretty consistend build quality, sound quality is a different matter though. I would not ever spend so much cash on something i havent played, however, im not the only one who thinks like this and that will mean you can get a pretty sweet deal on something like that.
Even then, i prefer the early 90's quality LP's, i know a pretty tempting white CS LP custom and for the 1700 pounds it costs its a damn lot of guitar for the money.
And anyway, my early 90's LP standard shreds anything soundwise, so if your more consearned with sound then build quality, just look around when you have the opportunity.
The R9 is an in-between version of the R8 and R0, it has most of the R0 specs but has a '58 neck. Most value for money would be an R8 if all is equal offcourse.