Advise needed. Debating between X5 and 328i.

[JoshLee89]

Hello everyone.

I have one very important concern, but since most of you are expert in these areas, I didn't know where else to ask this*question.

This is my*dilemma. The answer could be personal opinion, but as of now, i am having hard time deciding.
I am currently interested in two vehicle.

(1) 2007 BMW X5 4.8i Black on Black
2 owner vehicle
62,000 miles
premium (panoramic sunroof), technology (navigation, back up camera), cold weather package, running board, Logic 7, Rear Climate Control, Rear heated seats
NO Sport Package (but has 20" OEM Y spoke wheels, and NOT Sport Seats)

it is private seller, and we agreed on price of $31,500 as of now. (NO Tax in GA)
And he told me that, when I get checked up by BMW dealer (pre inspection for me to get extended warranty), anything that needs to be fixed, fluid, he will take care of it.
so ultimately, i would be only paying 31,500 + extended warranty (2450) if I choose to get a warranty, and vehicle will be up to date and fixed if there were anything wrong.*
The condition of the car is very good, no dent, only minor scratches. Car drove well, except run flat tires had humming noise on highway (is this normal?). (50% left on front and rear) and owner is bmw enthusiast, who took care of his cars.

(2) 2009 BMW 328i Coupe Black on Brown
2 owner vehicle
12,000 miles
Premium, Sport (upgraded 18' wheels), Heated Front seats, Automatic with paddle shifters,
NO Nav, No Logic 7

This is a car that my best friend is thinking about selling. (I'm a college student) My friend took a semester off, and I took care of his car for a 5 months, but he decided to take another semester off so he won't be needing a car. We agreed on so that We take this car to CarMax and get a quote to sell it to them (which is 3000~4000 less than when dealership resales), he will give me at that price. the car was quoted $25000 from carmax and I can just pay him that much.

So This is my dilemma.*
I am most likely gonna sell the car after I use it for a year, year and a half.*

looking at year, year 1/2 from now on, what will be the difference in price, (the money I lose)?

For example, If I buy a brand new Honda Accord for 30,000. It will depreciate it's value alot more in 18months, compare to let's say, when I buy $30,000 used 3 series since car value drops more first few years.

So what would be smart move for me? in order to save money thinking about selling it back in the future?

The difference in depreciation value for car (1) and car (2) will be similar? or 09 328i will depreciate more because it's newer car?

I of course want the X5, but I know i'm taking risk of buying car without warranty at first, and with a lot more miles. 62k. It's a lot right? Also. Cost to maintain the vehicle (tires, other stuff not covered under warranty ll be expensive)

Will i lose more money at the end if i buy newer 3 series? But the demend for 2007 cars will be a lot lower 2 yrs from now on so x5 ll depreciate more?
Please give me your personal opinion.
Considering every aspects, what would be wiser choice for me?
I would get "more of a car" with x5 and its ultimately what i wanted.
thank you so much*