This was going to be posted as a reply to another thread, but I think it may be worth posting just on its own.
I poked through the lens database and every lens that showed as a 9+ for those three categories (regardless of the rest) I jotted down. In theory, these should be the 'best of the best' (at least according to people who peruse the forums).
The list was kind of surprising.
For the Pentax lenses, I just went through and picked qualifying lenses regardless of number of reviews.
For off-brands I used a 6 review minimum. For the miscellaneous off-off brands I dropped that back to 3 just because the reviews are spread incredibly thin (Lots of 1 and 2 review lenses) and at that point didn't feel like bothering going back to the off brands and redoing them.
A big caveat is that some of the reviews obviously were judged by only one or two people regardless of actual number of full reviews - ie, most of the reviews were older, and so weren't broken down into subcategories. Obviously some could have been judged by only one person who could be completely insane and as of yet doesn't have a number of other reviews to lower the ratings. The reverse is true as well, of course - I could be missing a lens because someone has an insanely high bar for quality.
Anyways... this is the list that kicked out. The biggest surprise to me was probably the DA 50mm trumping its FA/F/A/M cousins. It rated better overall then the others (despite them also showing on the list). The other big surprise was the amount of ancient K-glass and Taks showing up. I wonder if part of that could be a nostalgia boost.
Quote: Pentax
DA 40mm f2.8 Limited
DA 50mm f1.8
DA* 55mm f/1.4
DA 70 f/2.4 Limited
DA* 300mm f4
DA* 50-135mm f2.8
DA* 60-250mm f4
D FA 100mm f2.8 Macro
FA 43 f1.9 Limited
FA 50mm 1.7
FA 50mm f2.8 Macro
FA* 85mm f1.4
FA 100mm f2.8 Macro
FA* 200mm f.2.8
FA* 300mm f2.8
FA* 300mm f4.5
FA* 80-200mm f2.8
F 50mm f1.7
F 50mm f1.7 Macro
F 100mm f2.8
F* 300mm f4.5
F* 250-60mm f5.6
A* 85mm f1.4
A 100mm f2.8 Macro
A* 135mm f1.8
A* 200mm f2.8
A* 300mm f2.8
A* 400mm f2.8
M 100mm f2.8
K 28mm f2
K 28mm f3.5
K 30mm f2.
K 50mm f1.2
K 50mm f4 Macro
K 55mm f2
K 85mm f1.8
K 85-210mm f3.5
Super Takumar 50mm f/1.4 (V1)
Super Takumar 50mm f/1.4 (V2)
Auto Takumar 85mm f1.8
Super Takumar 85mm f1.9
Macro Takumar 100mm f4 Macro
Takumar 200mm f3.5
Takumar 200mm f5.6
-----
Sigma (current)
70mm f2.8 EX DG Macro
300mm f2.8 APO EX DG
500mm f4.5 EX DG APO
-----
Sigma (Legacy)
70-200mm f2.8 EX DG APO Macro HSM II
70-200mm f2.8 APO EX
120-400mm f4.5-5.6 APO SG HSM
-----
Tamron (current)
70-200mm f2.8 Di LD Macro
90mm SP AF Di Macro
----
Tamron (Legacy)
Adaptall-2 180mm SP f2.5 IF
Adaptall-2 300mm SP f2.8 LD IF
-----
Vivitar
105mm f2.5 (Series 1) Macro
135mm f2.8 1:2 Close Focusing
55mm f2.8 1:1 Macro
90mm f2.5 (Series 1) macro
-----
Russian
KMZ Helios 44-2 58mm f2
-----
Voigtlander
125mm f2.5 Macro APO-Lanthar
180mm f4 APO-Lanthar SL
58mm f1.4
-----
Miscellaneous
Kiron 70-210m f4 Macro
Pentacon 135mm f2.8 Preset
Petri 28mm f2
Panogar 90mm f2.8 Macro PMC
Sears 50mm f/1.7
Mamiya/Sekor 55mm f/1.4
Revuenon 55mm f1.2
Chinon 50mm f1.4