If you are set on a V-Strom for first bike, go with the 650. The engine and transmission are more compliant and forgiving than the 1000. The DL1000 is NOT a good beginner bike. Generally, if you have to ask which to get, you should get the Wee. Vee riders already know what they want.
In all honesty, neither DL is ideal as a beginner's bike, particularly for someone who stands 5'9". The DL is tall, top-heavy and quite unwieldy at low speeds. My advice would be to go buy a cheap, used dualsport like a TW or KLR. Ride that for a year until you get you chops, and then decide what you want. Most riders find that whatever their first bike is, it's not what they want after a year or so. Talk to anyone who's been riding for a long time, and you'll find that most of them change bikes pretty frequently.