Okay, I read through this conversation, then made the mistake of reading up on the series on wikipedia, and seriously, it's not confusing at all...
"Fate/Deen Night" refers to the 2006 "Fate/stay night" series by Studio Deen, correct?
I think I'll try the first couple episodes of that series, but if I'm not into it skip to first few episodes of UBW before writing the franchise off, and if I end up liking either enough I'll keep my fingers crossed that MVM has their releases on sale over xmas.
Thanks all for the insight, even if it did leave me more rather than less confused ;P