That's... kinda vague. Your requirements could include anything from a $200 Atlas to a $25,000 HLV-H.
I'm assuming you're new at machining in general, so the question is, what do you plan to do with it? Or what do you
want to be able to do with it?
The general answers to "what lathe?" tend to be to find a good, used, American lathe, like a 9" Southbend, a 10" Sheldon or an 11" Logan- or one of a myriad range of similar sizes and brands.
That's not always possible- large areas of the states were never really 'industrial' and so machine tools in general aren't common- and when they do appear, there's generally a lot of competition from other home-shop types.
In that case, the answer is generally to try and find a decent
new import lathe. A popular one for people that don't need large parts done, is a 9x20, made by Grizzly, Jet, Harbor Freight, and about a dozen other sources.
Personally, I tend to recommend "buy American" myself, but I also know that's not always easily possible. I also believe that any lathe is better than no lathe, and I'd rather have a HF 9x0 than nothing at all.
But, again, we need a bit more data.
Doc.