Always use a professional framer to frame your new prints.
My preferred method of framing is where the prints are either taped to the reverse side of the mounting board or suspended on archival clips. Clips are hinged onto the backing board of the frame using a minimal amount of archival adhesive, which allows the artwork to be floated between the glass and the backing board, ensuring the protection of the print and easy removal for re-framing.
Mounting board should always be museum quality, 100% acid-free and 2mm clear, museum display glass or non-reflective UV inhibiting glass.
To achieve a clean uncomplicated look I mainly use white or off-white mount board within a simple black or white frame.
The weight of the outer frame is adjusted according to the size of the print.