I started my long slippery road towards an obsession for the perfect tone myself not so long ago.
I started with a PRS CU 22 right out of the gate because it sounded more modern Jerry or at least modern GD like (jerry plus bob) than my American Strat.
It's possible to replace the PRS rotary switch, which is unique in how it organizes the coil splitting and different configurations of split and humbucker modes of the neck and bridge pickups - compared to all other brands - with Strat like switching still in a rotary dial. I did and it allowed me to isolate the neck and bridge pups in single coil mode with the addition of a couple of mini toggles. This is something I could not do with the PRS rotary switch.
That's part of the battle. The next step with a PRS is to add a middle position PU. With the 22 fret model it's easy. Fits just fine with a standard trim. I dropped in a Dual Sound which is gorgeous when paired up with the PRS neck PU.
To go almost all the way you can install a Wald Electromics UGB/ pre-amp. This nails the Garcia tone as it gives the guitar an almost acoustic tone. Simply put it gives it more clarity. As many folks will say on this forum, it is more than a buffer, it's a tone enhancer. Really great investment.
My battery is located within the existing shield housing the controls. Fits just fine.
I only replaced the stock PRS neck pickup - the Dragon II - with a Bare Knukles Stormy Monday and just love it. Many folks ditch the Dragon II bridge pick-up but opt to keep the neck Dragon II. EBay is full of PRS bridge pups but the Dragon II neck pups are hard to come by. I saved my Dragon trebble (bridge) pickup and eventually purchased a PRS Torero in which I swaped our the EMG's and dropped it in there (along with, again........a Dual Sound in the neck postion). I probally could have built a custom build by then, but I have a real affinity for my PRS CU22 so that's just the way it evolved.
What I learned from swapping pickups in the Torero is the PRS gets you most of the way to a decent Jerry tone without the middle pickup. I did a bunch of soundcloup clips for folks interested in this. I picked up my Torero in a trade for some black shadow speakers and a but of cash. I've less than 600 invested in it now including a UGB so it's a true poor mans Jerry rig and was way cheaper than a custom build, and heck, it even came with a battery compartment.
I just linked a vid of my PRS CU22 in action if you are interested, under my Axe FX demo post.
I can't speak to the OBEL as I don't have that feature and have avoided that road as I play with two or three different guitars at gigs and jams and am pretty happy with that part of my set up (my effects sound just fine). I can speak to the PRS trems. Just lock em down or at least tighten them up. My Torero has a Floyd rose which I had blocked in one direction and tightened up and I can do decent country bends all day long,....and drop the odd dive bomb.
I think PRS is a great platform for clean bright Garcia like tones. Good luck with it!