1st cart, looking @ 2021 L6 Elite, Pros & Cons?

[Rcode]

Hey all,
I'm looking at buying a new 2021 EZGO Express L6 Elite. I've looked at other brands (Club Car, Yamaha, citEcar, etc.) but EZGO seems tough to beat. Here are my main questions...

1) I plan to contact Bob Boyce and see if he can turn it up some. What's the speed limitations on the new 4.0 Lithium carts? Has anyone had one turned up? Would like a top speed of 30-35mph.

2) Any reason to go to the 72 volt lead acid over Lithium?

3) I'm planning to use this:
> at the dragstrip and may need to push/pull the car
> pulling a small trailer around the property for brush removal
With this cart handle the job?

4) What's a good price for a Lithium L6 4.0 with premium seats,
hitch, flip down windshield, led lights, glove box kit, 82" roof
and turn signals?

Let me know if my expectations are to high.

Thanks in advance for all of your input,
Keith
Huntsville, AL