What spark plugs do you use

Hi guys
As it says what plugs do you use on your p38.
I have always used BPR6es on my 2002 4.6 with lpg but found some others on the web called
Accuspark, they seem to have triple spark. Has anyone used them, if so, what did you think of them?

I have the GEMS engine, and just use the Champion sparking plugs specified in RAVE.
Never had any probems with them, I run on LPG too.
In fact I've never seen and difference in performance with expensive sparking plugs over cheap ones so I juse buy the standard ones and spend the change on beer.