The three brands you have chosen are unquestionably good, but if your guide is intended for beginners, I think you might want to suggest a few lower cost options too.
The cheapest of the tree makes you recommend will be the Yamaha with the 280, but for a lot of people that will be beyond their means or what they want to spend. There are a number of cheaper alternatives that are getting good comments on this forum, maybe you could include some of them.
I think for beginner saxophones a table of ones to stay away from might be more useful.
The Cannonball Alcazar is an excellent student saxophone with many of the features of professional models at an attractive price.
These are just some of my recommended brands from my saxophone teaching guide. If anyone has other brands they want to contribute to this then post below
Alcazar replaced the Excalibur. Cannonball's intermediate sax. Nice horn. Seen them go for between £500 and £600 second hand in good nickI`ve not heard of that one .. how much is it ? (hoping that you won`t be the victim of a drive by shooting if you tell us :shocked
Buffet A400 and T400! Buffet the Yamaha Slayer... Excellent sounding horns - genuine depth of sound and quality of tone, and not even a hint of excessive brightness.
Disclaimer: I sell saxophones
I see three price ranges: budget, intermediate, high.
As a budget instrument, sometimes the seller is more important than the saxophone. JP and Jericho come to mind for the UK: they guarantee some quality and post sale assistance.
The intermediate (where my Sequoia are) is a difficult area. Many Taiwanese instruments are in it because regardless of quality, they cannot bring a higher price tag. Here is where bargains are. As an alternative to Sequoia (still best value for money, based on my sound concept) BW, CS and Mauriat can be a pleasant surprise.
I find expensive horns a bit overpriced. Keilwerth, Yamaha, R&C and some Selmer (I would add Yanagisawa for soprano) made at least one instrument that made my heart beat faster, but I would never buy an instrument based on the brand's name. If I had 4k to invest in one instrument, I would probably try everything available, to let people in the shop to enjoy my testing.