Fuel Pump, Grrr..... Options

[BluuFire]

So I was driving to a job interview when all of the sudden I push my A/C button and my engine revs drop to about 300 or so rpm. So i pull over and tried to start my car up again and the engine would crank but would not turn over. So I had to get my car towed to a local mechanic to have them look at it. They give me a call the next day and said they started it up right away and it ran fine. At this point I was really confused... I went to go pick it up earlier today and got it back and started driving away. I got one block away from the place and it died on me again so I got it back to the shop and he takes a look at it. He checked it over alittle bit and he says he thinks its a bad fuel pump.

First off, does this sound like a bad fuel pump to you guys/gals?
Also, if it is the fuel pump, what is the best brand to go with?

Any help at all would be greatly appreciated! Sorry, Im done ranting...It just peevs me when a mechanic looks over things that should have been looked at in the first place.

[BluuFire]

No it happens all the time. It will be fine right after you start up but as soon as you get on the gas, A/C or not, the revs all drop like crazy. He tried putting the car in drive and then pushing the brakes to try to get it to do it and he made it sound like he knew for sure that it was a fuel pump