Upgrading to the 120# struts is probably a bit overkill in the OP's 198RD (it's only 1/2 the bed being lifted right?), but I considered it for my trailer. I ended up going with OEM replacement (100#) because that's what was readily available at the time and for the price I wanted to pay. If you can get your hands on them easily, and you're lifting an entire queen bed with a topper and linens, I would definitely upgrade to the 120# struts. You may need to reinforce their mounting points, but that's not terribly difficult if you're even somewhat proficient with a saw and some screws.
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!