Just so you know, 0.5x barlow lens gives you a lot of working distance -- too much to be comfortable in my opinion. With the standard 10x eyepieces and 0.5-5x objective zoom, you will get a good 8" of working distance. For me personally, that means I have to stretch my neck a good deal and sit pretty high up.
For my setup I use a 0.75x barlow lens. That gives me about 6", which I find ideal for getting a hot air rework want underneath, tweezers, iron, etc. without making me sit in odd positions.
As for a microscope recommendation, I have used Amscope in the past and they are fine for the money. While I really wouldn't go back after having gotten my Nikon SMZ-2B, the Amscope SM-4TPZ head will be perfectly fine for soldering. It also features a trinocular simulfocal port for using both a camera and the eyepieces at once.