Personaly I'd get neither. If I wanted to use gaff cards I would use 2faced by Dave Forrest. This contains the DVD and some really good gaff cards.
http://magictricks.co.uk/shopexd.asp?code=4779
But If I was to get one of either ghost or red deck, I would get red purely because so many laypeople look at the ghost and tiger deck and think they are gaffed, so if you're about to perform a trick with a ghost/tiger gaff deck you don't want them to think it's gaffed even before you start! They'll be all like 'let me so those cards' which you know you can't do until the end.
Don't get me wrong I like the black decks for flourishes and colour changes but I'm just not a fan of using them as normal cards.
Also, why don't you head over to the Introductions area to well, introduce yourself!