well i will so, Yeah id go with the 6000k or less, if you go higher than that then the light that comes out is a lot blue-r looking and it doesnt light the road very well, Beau has HIDs that are from ebay iirc so you could ask him where he got his and what he thought of them, im not sure of the quality of them but other than the usuall "my mates mates car went on fire" stories you here abour anything from ebay I havent heard any disaster stories.,
the legalities of it were battled out last year, and the result was, erm, unless you have a car that *could* be factory fitted with them (e.g a stilo) and then buy the HID kit, then buy the actual HID housing from the upgraded stilo, with its headligt washers and/or self levelling (to prevent flair, which is what jug is banging on about, and tis true) then its illegal.
by which time you've spent...
£100 for kit
£2-300 for headlight housings (thats new because they are rare as funk).
£2-500 for other fittings and electronics for the levelling (legal requirement)
you might as well just have sold your stilo, and bought a fancier one in the first place