Many many years ago a friend was looking to buy into new technology. It was the era of the Newton. Wow, it was a great technology. My friend couldn't decide if he wanted one and went on a search. His search went on for months. Almost every day there was an announcement of something that would be bigger, faster, better. He eventually bought a TI watch that sync'd contacts and calendar by flashing a computer screen in morse code.
Bottom line, is don't let "overanalysis paralysis" get you.
Find a car you like. Decide if the price for that car is within your boundaries, and if so, buy it. Two weeks later you might find one that was a better deal. Four weeks later you'll find you stole the one you got.
Good Luck!