I'm getting ready to buy my first strobe light set for portrait, fashion, product and location shoots and would like some advice on whether or not the Elinchrom RX600 will be enough light. I'm having problems finding the guide numbers for the RX600. They are not listed in their product information. If I'm shooting interiors, I want to make sure I have enough light reach. If I'm shooting portraits with soft boxes, I want to make sure enough light is coming through. I have been reading reviews and Elinchrom gets rave reviews, but is there another brand as good as the Elinchrom, but not as expensive? Thanx!