The entry level tables mentioned are capable performers. Some complaints of platter wobble with the RP1 out of the box based on several reviews Ive read by actual buyers, not professional reviews. Not sure if it's the platter or subplatter or a combination. Anyway, Im sure all the entry level tables can potentailly have some qc problems out of the box. Being new, should there be a problem, they can be exchanged. Personally, If I were just getting my feet wet with vinyl, to see what it's about, I wouldnt buy an expensive table from the start. I think the entry level tables are plenty good enough to let you know whether or not you will appreciate the format. Both my tables are modest, sub 1K tables. And MMF5 I got new over 10 years ago, and a Rotel RP900 with Rega arm I bought used fairly recently for the headphone system. That MMF 5 is a nice, budget table, and real nice at the sub $500 price tag back then. The arm isnt a world beater but very decent. I havent had any issues with it. That table uses an AC Synchronus motor and I havent had any hum issues. Cant comment on hum with the new tables but I would imagine that some carts and set-ups (associated electronics, etc) will be more prone than others as has always seemingly been the case with vinyl systems.
VPI is supposedly coming out with a lower priced entry level (for VPI) table in the near future. But Im reading now that it will still be somewhere at or under $1500. Still more than I would spend to get my feet wet but it has me a little curious. Ive been interested in the Scout for a while but dont have the money to spend. I think I would personally need to spend over 1K to appreciably better my modest tables beyond what cartridge upgrades can do. And with my being happy with budget MM carts, including some of the very affordable vintage MM's, for me the diminishing returns on spending a lot for a table probably would come pretty quick.
I think that if the table has a decent arm, decent rumble and wow numbers, accurate and stable speed etc, ... all within acceptable tolerances. And is isolated, or can be isolated from vibration, then it makes for a table that can allow you to atleast get a good taste of vinyl. I think the entry level tables mentioned can do that. Obviously they can be improved upon by spending more money for better tables or for upgrades to those tables that allow an upgrade path. But they are a good starting point, and even an ending point for some. And I agree that the most signifigant tweak is a good cart (that the listener enjoys) as long as the table is capable or better. A bad sounding cart on a great table is still bad.
Just my 2 cents here.