Advice on buying a new 3d printer

[curious aardvark]

you already have aprinter that prints small detials - 2 in fact.
All you need to do is change the nozzle size :-)

A 0.2mm nozzle has 4x the resolution of a 0.4mm nozzle.
Change nozzles, Adjust accordingly in your slicer and you've got almost resin grade print detail :-)

picture illustrates size difference beyween 0.4 mm - the big cylinder and 0.2mm, the small cylinder

point2inpoint4.JPG

It's all down to flow rate and viscosity. So for smaller nozzles you need to print slower and hotter, with smaller nozzles you get a lot more back pressure, so don't need to push quite as fast.
But you'll be surprised just how much difference using a smaller nozzle diameter can make.