You can buy a Scandoubler which is a box that plugs into the 23-pin
video port and doubles the 15Khz Amiga output to 31Khz PC monitor
frequency.
They are expensive if you get a Scandoubler/Flicker-Fixer all in one
unit (the flicker fixer stops interlaced screens flashing in Hi-Res
Laced)
Alternatively, you can get the silver Commodore VGA box and run your
machine in Multiscan Productivity - don't think this would work with
games though.
I have an EZ-VGA Plus and there are many more Scandoublers for
Amiga->PC monitors.
If you want games on it maybe try the Philips CMK88II (can anyone
remember that one!?) and the old Commodore 1940.
The best 15Khz monitors though are the Amiga badged Microvitec 1438
(14"), Microvitec 1538 (15" with integrated speakers) or the
Microvitec 1701/1764 (17").
:-)
