Depends on what you want. IMO Partially Committed Racing (PCR) is the best trail rig/ U4 capable chassis platform on the market at this time. It's got plenty of room for activities.
Their chassis is CNC bent/ notched. So the fitment is nice.
I've got 3 PCR roller projects now including
@extremetownie I'll try and share some pictures as we progress further. I'll do a build thread on mine hopefully starting in 2023.
If you're looking for full on rock racer, you want to look at reject fab. Their racers records speak for themselves.
Obviously other great options in the south east. It would be more helpful to share what style of rig you prefer and want to build.