You can do some "window shopping" in terms of seeing which machines appeal to you.
Also, learn which machines play only certain types of records: Cylinder players - 2 minute or 4 minute-only machines; Lateral-cut (Victor, Columbia, etc.) vs. Vertical cut {Pathé`, early Emerson, Edison Diamond Disc) records, "Odd-spindle machines": Standard (½"), United ( 1-½"), Aretino ( 3 "). While these machines are neat in their uniqueness, single-taskers can take up a lot of space and may have limited resale appeal (?). Also, finding records can be challenging. For some, this kind of challenge is part of the attraction.
In general terms, Victor, Edison, and Brunswick made top-quality machines, even in their lower price points. You won't find better cabinet work than Victor or Brunswick.
Columbia, while a very old name in talking machines, are not quite as robustly built, but nice examples can provide a lot of enjoyment. I have a Grafonola Deluxe in American Walnut that is every bit as impressive as my 1909 L-door Victrola.
Silvertone machines are also of high build quality.
Once you go beyond these brands, you start getting out into the weeds.
Examine potential purchases very closely before hand. Most 1912 - later machines employ zinc die-castings (pot metal) somewhere ( particularly Columbia, and other "off-brands" ), and early pot-metal alloys are notoriously unstable, and are usually cracked, swollen, crumbling. Reproduction parts are available for more popular machines (Columbia, Victor Orthophonic), but probably not for more "unique "machines.
Try to get the best condition cabinetry that you can; factory finishes were done by highly trained professionals, and recreating them takes a tremendous amount of time and talent. Watch for loose glue-joints, missing glue blocks or decorative appliques, lifting / damaged veneer...