pc1 wired, pc2 wireless?

YES

But, remember for every wireless pc you add, you cut your bandwidth.
example: 54g /2 = 27mbps ....

I'm using the same setup with difernet vendors.

For best performace it's always better to use the same chipset. So see what is being used is the wireless pc then match the AP to it. If your wireless supports large packets, use it. It will double the wireless connection speed (108, 125 mbps vs 54).

Here is what I used to decide my setup 2yrs ago.

http://homepage.mac.com/techedgeezine/2004-0402_g-turbo_shootout1.htm

Remember this article is old, but still applys today.