The member xootr_swift added nice suspension fore and aft on his Swift but it's not inexpensive. Instead of getting nickeled and dimed, you'll get Franklined Not to mention the shop charges if you're not inclined to do the work, and finding a competent shop willing to do it.

Tim's suggestion on the taller Swift riser, to sit more upright and remove some weight off your hands, is a good starting point and fairly inexpensive. You can also try ergonomic handgrips like the Ergon or BBB Ergofix. Another option is wide, high-pressure tires run at lower pressure (or at least one on the front) to help smooth out the ride.

For what it's worth, I've added suspension to my Swift for cheap but it took lots of head-scratching and patience searching for the right parts. I've also recently decided to remove the suspension because it knocked more than 2 mph off my average speed, and I was none too swift to begin with

My Swift with fork and saddle suspension (both SR Suntour). "Upgrade" cost was about $120, added around 7 pounds But being a tinkerer it was kinda fun too.