Vista: Choosing between 32bit and 64bit

[AwesomeSauce]

By the end of the month, I will have enough money to build my brand new computer. Here are the basic specifications:

Intel quad core 2.66GHz processor
4GB (2x2GB) DDR2 RAM
Nvidia GeForce 9600GT (x2 SLI)
Linksys WMP54G v4.1 wireless card
250GB hard drive, 750watt power supply, 22" LCD monitor, yadda yadda...

One of the things I'm worried about right now is my Linksys PCI card (this is the only way I'm gonna connect to the internet in my bedroom). Now, Linksys DOES have a vista driver specifically for this card. The only problem? It's a 32 bit driver. They don't have 64-bit drivers for any of their wireless cards (at least, the cards I was looking at).

Big question: Is the 32 bit driver for my wireless card gonna work on the 64-bit vista?

I'm somewhat of a newbie on this topic. I don't know how 32bit software will conflict with 64bit software or anything. I would like some insight on this.

Finally there are many other factors that are making me stuck between both versions of vista. Here is basically how I see it:

32bit Vista: Pros
Safely runs most software
More stable

32bit Vista: Cons
Won't support more than 4GB memory (I would like to upgrade someday)
Won't fully utilize my 64-bit capable CPU

64bit Vista: Pros
Supports WAY more than 4GB of RAM
Utilizes my hardware to fullest extent; more powerful

64bit Vista: Cons
Less stable?
Less compatible software
My drivers - specifically for my wireless card - might not work

So with that, I would like some ideas on which would be better for me. This is an issue that's been fresh on my mind lately and some help would be appreciated. Thanks.