IMHO a silly question, unless you are rolling in money.
The best way to go is, one of the best turntables you can afford and one of the best arms you can afford with one of the best cartridges you can afford.
Do not buy two fair set ups at the expense of one excellent one. If you have to spend some time setting up cartridges, so be it. You are cheap labor.
There are usually limits in terms of space so, two arms on one turntable is the most space effective and also the above argument still holds, one great table vs two not so great tables.