I own the following jackets. Here's how they rate in terms of air flow relative to each other, IMO
Alpinestars CR-one Suit - B+
Shift Streetfighter Leather/Textile Jacket - C
Teknic Mercury Perforated Leather Jacket - B-
Joe Rocket Sonic 2.0 Leather/Mesh Jacket - unrated
Speed & Strength Moment of Truth Mesh Jacket - A+
varying price points and levels of protection.
for SoCal, I'd recommend a perforated leather jacket like the Teknic Mercury or equivalent. It doesn't get too hot or too cold (from what I've been told and the current West LA weather which I'm enjoying). You get the best of both worlds for SoCal weather, and if you need to layer up, you can throw a thermal or windbreaker underneath.
Alternatively, if you wanted a little more flexibility with a little less abrasion resistance, you could go with a textile jacket that will offer similar/better air flow, and they will generally have a windproof/wind-resistant liner included.
No experience with Draggin Jeans - many kevlar jeans appear to offer good abrasion resistance. What they will NOT offer is impact resistance. Keep that in mind when gearing yourself out.
For pants, I have Joe Rocket Ballistic 5.0 pants as well as Teknic Chicane pants. I run the JR's around town and the Teknic pants on more serious/spirited rides.
Gloves? No reason not to go full-length, perforated gauntlet, IMO. They're no better or worse to get on and off.
Boots - sturdy boots, preferably riding boots. I have Alpinestars Roam WP and CR-4 Gore-Tex XCR Boots. The first I wear for longer/serious rides, the others I wear to work.
Helmet - full face or bust, IMO. MAKE SURE IT FITS YOUR HEAD PROPERLY BY GETTING FIT IN PERSON. Any DOT/Snell helmet will work. Some people argue over having DOT-only vs. DOT+Snell. I don't know enough to make any particular judgement. If you plan on going to the track, most places will require Snell approved helmets. Higher end makes like Shoei and Arai may offer more features, comfort, or have a better shape for your particular head. Price does not necessarily guarantee protection, though.
ok, I think I'm done. Yes, I'm a gear whore 🙂