Gen 1 Suspension Upgrade stock no lift

I'm looking at replacing the suspension on my '98 SR5 V6 4x4 primarily due to age.
I only have about 100K miles on the vehicle
I'm running 31" tires and don't plan on going bigger.
I don't think I need or want a lift.
Interested in knowing a recommended vendor and model for a better ride.
I haven't done a lot of off road in the past and don't see this changing anytime soon.

I have been looking at Bilstein and Rancho shocks

I would like to get the the struts with coils so I don't have to mess with the assembly and I'm wandering if the leaf springs should be upgraded as I have bottomed out back end a couple of times.

Regards

 

I went with 5100's from wheelers. No complaints. Works great.

 

Marie @HeadStrong Off-Road is who you need to call.

What do you mean by 'bottoming out'? Hitting the bumpstops due to a large load?