In the planning stages for a garden railway and would appreciate some advice on track. I've seen options for aluminum, brass, stainless steel, and nickel silver rail. After reading pros and cons, I'm leaning toward code 250 nickel silver, which appears to be the priciest (of course). Any reason I should rethink NS? I do plan to use track power and my first phase of the build will be about 100' of track. I live in central Ohio and plan to purchase USA trains GP38-2 loco and freight cars (50 scale feet long or less). The smallest diameter in my initial plan is 12'. Is this sufficient for this type of train if I want to add body-mounted knuckle couplers (Kay-Dee)? Should I purchase flex track lengths for my straight sections and separate rail and tie sections for the curves? I've seen pics of the Lllagas track online and it looks awesome, but I read where there rail is difficult to slide onto the ties. I've read that Sunset Valley rail/ties are easier to work with. Anyone have experience and advice on the track/rail? Thanks!