I've used braid my entire life and am wondering what is the best flourocarbon to use for dropshotting and finesse fishing in cold clear lakes? im going to be using 8 lb test on a new spinning outfit and i am willing to spend as much as needed.

P-Line 100% Fluorocarbon.  Best priced ( 250yds vs competitors 200yds at or nearly the same $), most abrasion resistant, sensative, and managable fluoro I have used yet.  $14.99-21.99 for a 250yd spool.  Make sure you use some KVD Line and Lure Conditionor on it or any fluorocarbon for that matter and you will be set!  

avoid Vanish

Inexpensive and excellent floros-Viscious and Triple Fish.  Also excellent, but not so inexpensive-BPS floro.  If you try the Viscious, or Triple Fish you will be pleasantly surprised.

Seaguar INVIZX by my terms seaguar makes the best fluro line out of anybody it is a bit expansive but since price isn't an issue i would deffinatly suggest this line

The two Flourocarbon line I had very good luck with has been Bass Pro's XPS Flouro and Berkley's 100% Flouro Trilene. You should be happy with either one of these.

avoid Vanish

X2!

I prefer BPS XPS fluro.

avoid Vanish

X3

The transition is nice (gold is easier to see) but the blue box Vanish is horrible in my experience