I ride hard and push the limits of traction in curves. IF the pavement is smooth thru the curve :roflblack:, the sway bar and car tires are adequate for control. But if there's rough surfaces or pot holes (the norm :yikes

, the upgraded shocks are needed to recover from the bumps better.
As JayBros said, depends HOW you ride. Not the ride itself.
Agree with this.
Shocks and sway bars are used for different purposes. The sway bar is not in play on the straight, or sweeping curves unless the Spyder starts to lean, and/or has frame twist and torque. Shocks are used in this scenario in that the shocks give the ride quality and ride height that you want for your riding profile.
The shocks assist the sway bar in the corners, but only with the lean angle and as mentioned bumps and potholes, not the twist/torque of the frame - this is done by the sway bar.
You want better performance in the corners and on a good twisting road, go sway bar first. If ride quality is paramount, new shocks.
Suspension upgrades are expensive, primarily because of demand, small market these trikes and motorcycles. Watched a video the difference between shocks/springs and coilovers. The fellow doing the video mentioned that if you are doing a track day, off-roading, ditch banging, whatever - go inexpensive if needs be because ride quality is not an issue. When you get back to the road and ride quality is paramount, an inexpensive set of shocks may not fit the bill, ergo better shocks, better ride quality, and more expensive. There is always a trade off.
The other issue with inexpensive shocks is that if the shocks you get do not perform as expected, and you purchase another set, probably have spent the equivalent of the cost for the better shock up front, and still need to get the more expensive shock, BTDT.
My 2014 RT LE came with BajaRon's sway bar already installed. Good improvement over the stock OEM sway bar - test road a 202 RT with the OEM sway bar, corners were interesting. Not enamoured with the shocks, especially the rear. Air system works overtime when riding two up. Replacing all three shocks. Do the rear, you eventually will do the front. Putting on a set of M2 shocks.
Just a few thoughts, and my understanding of shocks and sway bars. Knew about these things years ago, but had to dust off the cobwebs for the Spyder.
Good luck.