I shopped around for months before purchasing my keyboard. I originally only wanted to spend a couple hundred dollars, but after thinking about it, I felt I would always be limited if I didn't have an 88-key keyboard. I got the Yamaha DGX 500 from Andy's Music Online <
www.andysmusiconline.com>. They have a nice selection and the best prices I could fine. Shipping in the US is FREE and it arrived in one week. Some sites I found, where the keyboard itself was actually cheaper, had shipping fees that were 20% of the price of the item! Keep in mind that we're talking about keyboards, not digital pianos. Digital pianos are much more expensive, but do have a better sound and touch. Even weighted keys on a keyboard cannot be compared to the touch of a real piano. But, it seems that your intentions for a keyboard are for composing only, not for practicing, so I wouldn't be too worried. For practicing and performing there really is no substitute for a real piano.