Depending on your budget, here is what I'd consider the ranking of Yamaha TTs, from the very best downwards. In this case, price levels tend to match up pretty well with quality rankings, so they get cheaper as you go down the list:
(These are direct drives
GT-2000X
GT-2000L
GT-2000
GT-1000
GT-750
(These are belt drives
PF-1000
PF-800
All the rest...
The first five on that list were only sold in Japan. The GT-2000X is by far the best, with a larger (HUGE) plinth with glossy veneer finish, heavier platter, beefier motor, etc... In fact, it is one of the best "mass production" (as opposed to "boutique crafted") TTs ever made, period, but it was sold in limited numbers, and remains somewhat hard to find and very expensive (several thousand dollars) today. It is THE Yamaha TT to get, if you have lots of money and don't mind spending it on something that gives you both terrific sound quality and some real pride of ownership ("bragging rights").
The GT-2000 and GT-2000L are much more affordable than the "X", but usually still run over $1,000 if you are buying from overseas. The only differences between the 2000 and the 2000L are that the 2000 is black (stained wood veneer, just like the NS-1000M speakers) and completely manual, whereas the 2000L has brown wood veneer and auto arm-lift at the end of the record. The auto arm-lift was also available as an accessory to retrofit on the (black) 2000 arm, making it functionally identical to the "L" version.
The GT-1000 and GT-750 TTs, despite looking a lot like the 2000's on the outside, are more cheaply constructed under the skin, and do not perform at the same level... but they're still fine TTs, compared to most, and quite a bit more affordable than their bigger brothers. {You get what you pay for!}
The PF-1000 and PF-800 are belt-drive tables with suspended sub-chassis. They were sold in North America and Europe, too. The ones sold in America had brown wood veneer and aluminum trim; the ones sold elsewhere were black in color. Other than the cosmetic finishes and the electrical voltages (transformers), the models were the same worldwide. The 1000 TT has a few improvements over the 800, like a little heavier, denser platter, but both are very similar to each other.
If you've ever thought of getting something like an AR, Systemdek, (suspended) Thorens or Linn, get one of these, instead. They're a later design with some innovative improvements, and sound quite good! They still sell for under $1000, and are still probably good value in that range, but the price has been going up steeply on these over the past year or two; it seems the word on them is getting out, and they may be developing a bit of a "cult following" (and probably deservedly so...).
As for the lower-down models, I think the guys above have already been filling you in better than I can. Those models will be more affordable and easier to find in most places. But if you can stretch your budget a little and want to skip right to a really superior-quality TT, I'd suggest one on the list above.