In a week I am flying DFW-LAX arriving around noon. I then have to wait for my next flight which is TG795 LAX-BKK which doesn't depart until 11:20pm. So I am wondering what a my options for killing this time? Here are some of my thoughts.

Note: I will no checked luggage just one (fairly heavy) backpack which I will be carrying around with me

Staying at LAX:
I am flying business class so I will have access to the lounge in the TBIT.
-Will I be able to check in that early and just hang out in the lounge for a while?
or will I have to wait before I can check in and thus wait hours before I can get into the lounge?
-what all is there to do at LAX?

Renting a car:
How long does it typically take to get a car and get on the road after landing?
Between this and needing to check in at least 2 hours before TG flight would renting a car be worth the hastle? Also where can I go that is close to LAX? I've been looking at Santa Monica or Venice Beach as they seem fairly close.


Taxi:
Looks like this would cost more than car rental and I wouldnt have a car I could store my bag in. Aldo if I go to say Santa Monica how easy is it to find a taxi back to LAX?


Hotel:
Ive thought about just getting a hotel near LAX and just relaxing but its too early to check in upon arrival and since its not an overnight layover I am not sure how practical this option is.


Itinerary-

DFW-BKK-HKT

HKT-BKK-MUC

MUC-CLT-DFW