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I didn't scrimp when I bought the D2X nor did I cut corners for the lenses I have.
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Without light, there is no photography. It's all ABOUT light. Don't skimp on light. If you want to get serious about studio photography, you'd be far better off spending $600 on a Nikon D50 and $4500 on lights, stands, modifiers, meter, softboxes, etc. than you would spending $4500 on a D2X and $600 on lights, stands, modifiers, meter, etc. Nevermind that $4500 worth of lighting and accessories would probably confuse the $h1t out of you if you purchased it all at once.
Look at lighting like you would your lenses. Bodies come and go - the D2X will be technically obsolete in 2 years (Canon shooters will probably argue that it already is obsolete [img]/ubbthreads/images/graemlins/smile.gif[/img] ). But if you choose a good lighting system it can last you decades. Light doesn't obsolesce. Sure, new stuff comes out with neat features, but light emitted from a flash tube is light emitted from a flash tube. I still have, and use, the first power pack I ever bought back in the late 80's.
The AlienBees gear is good gear. They've got great customer service, a decent number of modifiers and accessories, and reasonably priced replacement parts and repair costs. Their gear is well built and has well thought-out controls, better than anything else in the price range. They are a great way to get into studio lighting without busting your bank account. They won't frustrate you with erratic behaviour and poor design. Many people never need anything else. If, in the future you find something about them limiting, you'll know enough about lighting to look for a system that meets your new, expanded or specific needs.
In my opinion you get what you pay for when it comes to studio lighting. Consider anything cheaper than the Bees as disposable. It sucks when you blow out a flash-tube after 8,000 exposures and realize that the cost of the replacement tube is 90% of the price of the light, if you could replace it yourself in the first place.