You only can get my personal preference.
I´m a big fan of serious GS skis in no-nonsense lengths. Not that I spend my life on 4 km long and 100 m wide "autobahnen" in the Alps but I simply don´t see why a 15-meter-radius turn accomplished on a 21-24-meter-radius ski wouldn´t be appropriate on most of runs exceeding a bunny hill.
I still take part in some regional races where FIS specifics are required.
And, last but not least, you don´t get anything cheap from a true GS ski. It makes you work hard, it has enough muscle not to let you prevail, it can "teach" you the art of a perfect high-speed GS turn.
A true GS ski tells men from boys.
As we know today´s skis (including even the racestock GS) are generally softer in flex and therefore easier to handle.
a Dynastar GS in 192 cm: a very, very stiff beast but perfect for fast longer turns and skiing free
an older Salomon 190 cm LAB GS, originally a ladies´ raceski: fairly soft, highly enjoyable
as rock skis Head GS 185 cm, now also a softie and almost a SL-ski
(further, as seen in my profile, a Fischer SG 209 cm, fairly stiff but a great ski)
Then some other skis as well because I participate in development and marketing of the Cuech ski brand Sporten
My "home ski area", "Stammgebiet" in the Alps is Kaunertal/Pitztal/Fendels (all under one seasonal card).
As to the SL ski: I think it is a perfect ski teacher´s tool and a ski to have lots of fun with.
OTOH, I can´t imagine it as the only ski to satisfy all needs of a good skier if only on groomers.
The Head GS are with high-end VIST Worldcup plates and Tyrolia bindings which make it a real bargain difficult to resist.
At 190 cm I would try to get some more discount:
skis that long are practically unsaleable except to a few freaks like me (and you?)