Please help hack this deal

Hi All!
New here. I was pretty excited about my deal but think I can do better based on what some of you achieved. Any advice on how I can improve my deal/where to bring it down in price?

2019 QX50 Essential AWD
MSRP: $49,265
Dealer Discount: $4,100
Conquest: $1,000
Total Purchase Price: $44,165

Doc Fee: $250
Tax: $1491.74
Non Tax Fee: 33.50
MF: 0.00003
**Net Price: $45,940

39 month lease, 10 k miles. Cleveland area. Has ProASSIST, Premium heat, Premium audio
Monthly payment (tax included): $491
Only money due at signing is first month payment ($491)

Another question-
I am currently in a benz lease. My last payment is due first week of january, and then I have the disposition fee. This essentially wipes out my conquest $$$. Is it worth waiting until my lease ends first week of February? Or is there any way I can make this deal worth signing before the end of the year?

Thanks in advance!