Ok thanks, this has been extremely enlightening! I've talked to many people in the last couple of days and realize that it's all in the lens... (mostly)... What type of lens would you suggest for a nikon D90 and/or Cannon 50d..? Again this would be for portraits, modeling portfolios, head-shots for actors, and on some occasions events like weddings and parties... Thanks again everyone... Anbesol, DougjGreen, Ron, Sushigaijin, Frog, etc...

So what lenses should I invest in for what I'm trying to do?

Also good quality, yet affordable... I can't afford that $1000 lens quite yet