Fuel prices will probably not go down in the very near future. Buy what ever vehicle that you can afford and pay cash for it, keeping in mind what you need a vehicle for. If it is just for transportation, then something that gets good mileage and is low maintenance. Later on, when you get more money for toys, you can again purchase a PSD or other fun vehicle. At least this is how the wife and I did it when we first got married. We bought used, low mileage cars that we could pay cash for, or have very low payments.
The next few years might see some bumps in the financial side of things, so it might be wise to be frugal for awhile. Unemployment is at a all time high in our area, and this trend seems to be spreading across the nation.
Good luck in what ever you do.
Maxtor