I wouldn't buy shocks until you change springs, since you're planning on doing so, unless you put OME shocks on now and do OME springs later. I think the OME shocks would be okay with stock springs.
I tried Rancho RS 5000 and RS 9000 first and found them to very firm, even with the 9000s on the "1" setting. The OME shocks ride much nicer.
Ohhhh so nice with the top off! Too clean haha. Wish myn had a hood decal! Did you ever think about getting new seals for the topper? I'm so pumped to take my top off but like yours my top has never been taken off. I went to Toyota the other day trying to be proactive and get some new seals thinking that the seals may break apart cause the top has been on for 30 years, but found that Toyota no longer makes them. Did you have a plan incase your seals went when removing the top? Or are there any other options out there for replacing the seals?
I don't foresee any issues with sealing as my seals stayed perfectly intact. I am planning on going to a SoftTopper soon anyhow so I'm not too worried.