Shock Therapy or other suspension options for 1K

I have a 2015 2 seater xp1k that I want to do some suspension work. I have heard great things about shock therapy and I talked to them Thursday and they seem like great guys, but I just don’t see much options. I’m just curious if its worth it Vs. fox shocks, kings, elka etc. I don’t race yet but thinking about getting into it. Do a lot of dunes and desert riding. Just a lot of money to commit without being able to see it. any and all advice would be greatly appreciated? the stock springs are sagging and crap and want to go to dual rate