strobes, be wary if you add those... some like it in the corner lights some in the head lamps, where ever you decide to put it keep in mind those lil things generate ALOT of heat so dont keep them on too long. (meaning they will do some damage from within)
as for the lamps. they are both the same. THe HID package one i would buy cuz its cheaper, simply put dont put the HIDS if you dont want to add them. If you do want HIDS ( i strongly suggest getting them) there are other brands out there (phillips) that are much higher quality.
china brand HIDS would do you some good for a year or so but you want something that lasts.
i have considered strobe lights for a long time but since my Underglows went in i've determined they are not of much use besides fun in the night trails (which i used on friday night when i went about 100 km of loose gravel logging roads) drove along the beach and s*** and by damn alot of people got out of the way when they saw me coming.... pretty awesome for visibility purposes :o but strobes.. youll never use em so again its up to you.
Youll have to drill holes and seal it to avoid condensation.
edit :: i just checked the shipping. and depending on where youre at go by that. Be wary of ebay sellers, they like to trick people by shipping costs