They might be ok. But since you have a specific consist in mind and don't need a train set, I would keep saving your money for a LionChief Plus (LC+), maybe the 4-6-2 Pacific or 4-6-4 Hudson. Even the LC+ 0-4-0 switcher "A5" style is a great runner.
Another option would be the Williams by Bachmann 4-6-0 Old Timer. Any of these will pull more cars, and most importantly, run smoother than a basic LionChief. I know they cost more. But watch some videos on this Forum, or YouTube. Pay especially close attention to when the locos transition from a stop to first starting in motion. There's a difference!
Buy whatever makes you happy. But if this really is your first loco, I would like to see you start with something amazing that you can really build on. My $.02.