Telescope question! Which barlow lens is best for my 'scope

I have an 8 inch dobsonian skywatcher skyliner. All the details are here:
http://www.warehouseexpress.com/buy-Sky-…

I would really like to purchase a barlow lens, one that will increase the magnification of celestial objects such as planets but still retain my telescope's quality and detailed image.

All help is highly appreciated, and thank you i advance :)

The best Barlow lenses are the "Powermates" made by Tele Vue, but these are expensive. Second best are Tele Vue's regular Barlows. Next best is the Barlow lens imported by various companies under various names: Celestron Ultrascopic, Orion Shorty Plus, Antares UB2SD.

Nowadays I rarely recommend Barlows except for specialized uses like planetary imaging, which is the only time I use them myself. I've found that myself and other experienced amateurs almost never use Barlows, preferring instead modern high eye relief eyepieces with built in Barlows, such as Tele Vue Radians, Orion Edge-On Planetaries, Baader Hyperions and similar designs. For your scope a 6mm or 5mm eyepiece would be what I would recommend.

My experience with Barlows is that by the time you spend enough to get a good one, you could have spent the money on an eyepiece that would have done the same thing with less setup hassle and less optical aberration. If your purpose in buying a Barlow is to get more magnification at the same optical quality for less money, then you are wasting your time. Just buy the eyepiece you want.

Sorry if that is not what you wanted to hear. It's just my experience.

Barlow lenses are always an optical compromise. You'll get better results with an eyepiece that has a shorter focal length.