Nothing wrong with your current brand. Local stores also have Mobil1 75w140 too, along with the various automaker branded 140's. I'd only recommend a short maybe 5000-10000 mile break-in gear oil change. After that, probably not going to be much difference among any of the synth 140 grade gear oils for your application. Don't overthink it.
Valvoline™ SynPower™ Full Synthetic Gear Oil is formulated for ultimate protection and performance. A thermally stable, extreme-pressure gear lubricant, it is designed to operate and protect in both high and low extreme-temperature conditions. SynPower Gear Oil is specially recommended for...
www.valvoline.com
Discover how Mobil 1™ Syn Gear Lube LS 75W-140 provides supreme performance and vehicle gear protection.
www.mobil.com
Pennzoil Platinum Axle 75W-140 is used primarily in pickups, racing and high performance cars, and some older vehicles and offers improved low temperature flow.
www.pennzoil.com
If you want bragging rights, or a fancy sticker, then consider Amsoil, RedLine, RoyalPuple, HPL, Torco, Synmax, MPT, or all those fancy euro brands. Might even want to throw in the prison island brands too.
Since you're in Florida, there are synthetic 80w140 and even 85w140 for those of us that believe in viscosity.
So, what limited slip are you also installing?