Quick questions for you:

 

1.  What are your other system specs?  (memory and cpu are the key ones)

 

2.  What kind of slot do you have available?  (PCI-E or AGP...it should be mentioned in your documentation; I think it will be AGP but want to make sure)

 

3.  Is money really no issue!?!

 

On top of the questions, I can tell you the following.  You should be looking at better cards.  All the ones you listed are OEM chips and won't really be good choices for Aero Glass or Civ 4.  Since you probably have an AGP machine, you'll be a bit limited in options, but we'll find you something nice.  Also, a video cards memory isn't the most important thing to look for when buying a GPU.  First of all, it's misleading.  Each of the cards you mentioned probably has 64mb or less actual video ram, and leeches the rest from your machine.  Plus, you could have a 1gig vid card, but if your clock speed is too low it will still render poorly.  I know as well as anyone that buying GPUs is an exercise in frustration, but if you're patient and do your research you should have an excellent Vista experience.

 

One final thought, if money isn't an issue, you can pick up a brand new dimension, nicely outfitted for pretty cheap nowadays. 

1) I have 1150mb of RAM memory, Intel Pentium 4CPU 2.80 GHz, and a 32bit operating system.

 

2) I believe I just have an AGP slot.

 

3) As long as I get a good card that I can play games I don't care how much I spend.

OK, there are plenty of good cards out there for you, but you won't get a top of the line GPU either.  Fortunately, anything you get will be a huge step up from your current chip.  The biggest thing holding you back is the AGP slot and perhaps your power supply. 

 

In terms of cost and performance, the best card for you is probably the Nvidia 7600GS AGP.  You can find one from EVGA (a great brand) for 110 bucks on New Egg, and other manufacturers have them for even less.  HOWEVER, this gpu requires a 350w PSU.  If you have a Dell with a 305w you'd be fine.  However, if your comp only has a 250w I wouldn't risk it. 

 

If your computer is low on power, you're probably going to get stuck with a card that has passive cooling (in other words, no fan).  I'm no expert on any such card, but I'd suggest looking on NewEgg.  After browsing to video cards, start out by choosing the AGP 4x/8x option on the right hand toolbar.  Then you can continue to filter by price, memory, chipset and so on.  When you find a nice looking card (remember to pay close attention to the core clock speed, pipelines, and memory clock speed) go to the manufacturers webpage (always linked from NewEgg) and check the power requirements.  Then, by all means link to it in this thread and I'm sure someone will take a look.  In terms of brands, I like EVGA and XFX for Nvidia chips, and ATI or Saphire for ATI chips.  Good luck in your search, and please post back with any questions.  

 

Ah, something I hadn't even considered.  Have you had a chance to look around newegg at all?  Even if the specs aren't posted on the website, you can often get them off the manufacturer's page.

And the Nvidea card you recommended is a low profile card. My computer tower is smaller than most so that limited my video card cappabilities greatly because they cannot fit inside the tower.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814153028

 

Is this card any good. Also I noted that this card does not include low profile brackets, where do I get those.

I'm just going to throw the idea out there again that if you can afford to buy a new system, it would be a good investment in the end.  The new Dimensions are good machines, and you'll be able to pick a decent system up for well under 1000 dollars.  Dell also offers good payment plans if a lump sum isn't doable at the moment.