you should always try to follow the manufacturer's recommendation. if they call for full bore gate valves then that's really what you should use. you may invalidate the warranty if you don't comply with their implicit instructions.
personally not a fan of gate valves. they seize too readily, a good idea to give them a little turn off and on again every so often.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!