New Room Long wall or short wall?

For the first time in my life I get to set up a system in a new completely empty room. I will treat and furnish it as required for the best sound. After 40 years of this, I know what I am doing, but, not sure where to start. You guys and gals who have been through this before can save me a whole lot of trouble and time by advising me on whether to try the speakers along the short wall or the long wall. I know, I know, I should try both ways and see which works best. But, I'm hoping to save some time here fooling around and cut to the chase and listen to others who may have a definitive opinion on my question. You'll probably go 50/50, but, oh well, lets give it a shot.
Room is 9.5 feet by 14.25 feet. Much smaller than I would like, but it is what it is. I will be using components I already have so please don't tell me to change this or that to work with the room. There will be vintage EL84 tube amplification and a heavy focus on analog. Speakers are Totem Forests or Triangle Comet's if the Forests prove to be too much in this small space. Feel free to discuss that aspect as well. Thank you all in advance for any comments or ideas. If you want to keep it short, just simply vote: Short, or Long.