Voron
An open source design group creating the best, no-compromise 3D printer designs.
DIY but you get detailed, step by step guides, and a full bill of materials.
They have 4 designs for #FDM 3D printing:
V0 - small print volume, focus on portability and simplicty
V1 - medium to large print volume, focus on relative simplicity
V2 - medium to large print volume, focus on ultimate quality and speed
Switchwire - medium to large print volume, focus on simplicity