These place among the brightest known sources in the universe. Most will require a 12" -16" scope.
-gleaned from Veron-Cetty, Millquas(E. flesch) SDSS-III Hamburg QSO and other catalogs.
APM08279+5255 z=3.91 V =~16.5 12.0 Gly - Difficult field, rather faint, redish, resolves in 25" Lensed
B2 1422+231 z=3.62 V = 15.8 11.8 Gly - Very easy field, well resolved as quasi-pointlike, Lensed.
SBS1425+606 z+3.16 V = 15.8 11.4 Gly - Easy field, Extreme luminosity. Can be seen most of year NH.
HS1946+769 z=3.02 V =~15.9 11.1 Gly - Difficult field, Extremely luminous. Circumpolar at 77.1 N
HS1603+3820 z=2.51 V (est)=15.5 10.6 Gly - Difficult field, Possibly in outburst. visible in 12-14"
PG1247+267 z=2.04 V = 15.5 10.1 Gly - Very easy field, 1deg. S of 30 comae. visible in 12-14"
QSO B1225-1116 z=1.98 V (est) =15.6 10.0 Gly - Difficult field, equatorial. (southern dec robs it of .3-.5 mag from 40 N.)
PG1634+706 z=1.337 V = 14.7 8.9 Gly - Easy field, Possible in 8" on up - can be seen most of the year.
QSO B1718+481 z=1.08 V = 14.6 7.6 Gly - Easy field. Good for 8" Nearest of the Great Quasars, N of M92
SDSS1521+5202 z=2.21 V = 15.7 10.4 Gly - Easy field. X-ray weak brightest from SDSS dr7Q
HS1549+1919 z=2.84 V = 15.8 11.0 Gly - Easy field Extremely luminous, non lensed; dense protocluster core
*NEW* 01 47 09 +46 30 37 z=2.38 V = 14.9!!! 10.5 Gly - BRIGHT quadruple lens, recent discovery: "Andromeda's Parachute"
Check SIMBAD, NED or HEASARC for coordinates
WIKISKY (Skymap.org) is excellent for generating finding charts