The best 3D printer for what price?
Until you give an indication of roughly the price range you're looking at, it will be impossible to answer your question properly. You should also have an idea of what technology you're looking at using, ie resin, thermal extrusion, powder, etc. Each type of process has very different price points, but very different results. While it's probably safe to assume you're referring to thermal extrusion, a resin based system may be better for you if you need fine detail and tolerances. You will need to look into both and decide which is appropriate for you. The resin based systems have come down a lot in price recently, and with Autodesk releasing the resin formula as open source, the cost to run them will possibly drop considerably too.
Another critical consideration is the size footprint you need for the work you intend for it. A requirement for a larger printer will limit your choices considerably. Most plastic extrusion printers seem to fall within the 200 x 200 mm platter, with around the same Z, though a delta printer will have more z.