Short answer - yes. New aftermarket shocks will have preload adjusters, most likely have rebound damper adjustments - M2 shocks do, and probably 250 lb/in springs - I have installed new M2 shocks all round. Upgrading the front shocks will most likely entail a rear shock upgrade as well. A good set of front shocks with a shock spring better rated for the Spyder will support the front end of the Spyder better - keeps the weight distribution of the Spyder - keeps the front/rear weight distribution more consistent. Less rear weight will be transferred forward when stopping, emergency braking and such. Road clearance will be better and the probability of scrapping the front trunk eliminated. Significantly less lean/roll in the corners/curves riding solo or two up. Steering will be easier. OEM shocks allow too much weight forward, not able to support the weight properly, making steering harder. Ride quality and performance will be improved.
New tires, suspension is the only aspect of the Spyder keeping the tires firmly planted on the road, specifically the shocks. The better the shocks, the better for the tire longevity and performance. Viewed a video regarding shocks. The fellow in the video mentioned that if you want to off road and such, an inexpensive shock that does the job is great, Spyder OEM shocks, but when you get back on the road, you want the ride quality to be like that of a Lincoln Navigator - Elka/M2/Wilber/Ikon shocks.
A good set of aftermarket shocks are expensive, custom made for your riding profile. There are less expensive modifications that can be done, but when doing this always a compromise. The better aftermarket shocks allow you to tailor the shock spring rate for your riding profile. If you find the manufacturer's recommended spring rate not quite what you want, you can discuss the issue with the manufacturer, change the shock springs and carry on - difficult to do with OEM shocks even if you modify these.
My preference after having all 3 items done, shocks, sway bar, tires is shocks first, then sway bar if you want, tires are a nice touch. A sway bar will not replace or do what a good quality set of shocks will do for the ride quality and performance.
In defense of this, the suspension should be viewed as a system, where each item - in this case, shocks, sway bar, and tires, does a specific job and complements the other parts. Upgrade one item, ride and assess. If more tuning is required for your riding profile, make a further change.
A few thoughts and JMHO.