Dear Dream Merchant:
If you can afford it, I would highly recommend the DSR450 over the DSR400 or any of the other 1/3" CCD prosumer HDV cameras. With the DSR450, you get a professional production tool that competes nicely with most any other 2/3" SD broadcast camera out there. It has 24-frame, progressive shooting capability to emulate film's motion characteristics, and a native, 16:9, widescreen aspect ratio to further emulate film's wider aspect ratio. These are the same types of features employed by top-of-the-line cameras from Sony and Panasonic such as the HDW-F900 CineAlta and Varicam HD cameras, only the DSR450 is SD resolution and a fraction of the cost.
Since your country's broadcast infrastructure is still in its infancy, I think a high quality, professional-level SD camera such as the DSR450 may serve you far better than a small prosumer HDV camcorder. If budget is an issue, and you have an immediate need for HD capability, the JVC HD100 is a nice pro-style product which produces a 720P HDV signal. The HD100 is still what I would consider a "prosumer" camera with its 1/3" CCDs. With the JVC, you'll save a lot of money over the DSR450, and you'll have pictures with greater resolution, but at the cost of higher picture noise levels, lowered low-light sensitivity, and inherently greater depth-of-field (not desirable for "selective focus" photography--a popular cinematography technique). And, your HDV workflow will be a bit more taxing on your editing workstation. In my opinion, the Sony DSR450 is a breakthrough indie-cinema camera at a price that's pretty darn low for what you're getting.
Regards,
Ralph Oshiro, DP/camera operator