Ok....I fiddled around a little and got 1920x1080.
I found this page:
http://www.widescreengaming.net/wiki/Grand_Theft_Auto:_San_Andreas
Under "Supported Resolutions" it states that 1920x1080 can only be achieved with version 1.01.
So, with the no cd fix in mind I hunted down the only version 1.01 crack I could find..."GTA: San Andreas v1.01 [EURO] No-CD/Fixed EXE"
Downloaded, installed, and 1920x1080 was among the available res.
Unfortunately, in order for the game not to lag/chop I had to turn most of the settings down....and the picture seems to be either stretched out or smushed down.
I was even able to add the new .exe file to steam so I can launch it from there.
So...these seem to be my two options...
Version 3.0
Draw Distance - 16/16
Fame Limiter - No
Wide Screen - off
Visual FX Quality - Very High
Mip Mapping - On
Anti Aliasing - 3 (max)
Resolution - 1024x768x16 (4:3)
-The picture is proportional and super smooth
Version 1.01
Draw Distance - 8/16
Fame Limiter - No
Wide Screen - off
Visual FX Quality - Very High
Mip Mapping - On
Anti Aliasing - Off
Resolution - 1920x1080x16 (16:9)
-The picture is stretched and/or smushed and if I adjust one setting up any it starts to lag/chop
Go figure I can run doom 3 at 1080 on high settings smoothly and I have to back off the GTA:SA settings at 1080.
Anyway...
So, there you have it....I guess its s personal preference from here eh?
Maybe someone here knows of something I can do/mod with version 1.01 to get proper proportions (not so smushed) or maybe if you find a resolution list something more can be done with version 3.0.
....I'm going to go eat more turkey :D