Between the 70's and the mid 80's I used Fender, Ampeg and Peavey 15" cabs. Then 20 years of EV15's in Dynacord and Mesa Boogie cabs (IMO the best of the lot).
But with the advent of "properly" designed 12" cabs I don't see the need for anything larger.
Jeff Berlin is a fantastic musician and player, but I thought the tone in the earlier video was terrible. All fart and no substance.
I have a cheap Cort Jazz which looks good, plays well and only weighs 7lbs. Unfortunately it sounds very average. You can tell where the savings were made. Now I'm running it through a Sadowsky Preamp pedal it's sounding much better.
Maybe, I have no experience with EMG's but the EQ in this pedal is very strong and my marginally-OK-at-best Cort pickups are 90% the way to sounding like full blown Sadowsky pickups.
I had the same dilemma.
Do I spend £400 improving the sound of a £200 bass My lightbulb moment was to buy a Sadowsky preamp for £50 (other preamp pedals are available).
This has improved the tone 1000%.
Many good suggestions here.
I also have an AG700 which is a fantastic amp, and very clean and uncoloured, but seems to me that they designed the TH500 to be on the same wave length as the Precision bass. It enhances the Precision-ness of the bass perfectly.
For a PJ I'd recommend you listen to an Aguilar TH500. I've been using mine with a PJ5, with flats, for over 10 years. They enhance the Precision format, warm, full, well defined and, from a whisper to flat out, sound great!
I had Bergantino 112 and 210 cabs and the 210 didn't have feet on the right surface to stack with the 112.
I didn't want to drill holes in those cabs so bought a set of feet from Maplins and placed them between the cabs.
A good solution that didn't require woodworking tools or damage to the cabs.
The TI's on my PJ5 are nearly 10 years old. Still sound fantastic. They'll see me out. I also have a Jazz with 12 year old GHS flats, still going strong.
I also put a lump of foam under the strings, of each bass, to take off some of that top end!