i got this,
http://www.logitech.com/cf/products/productoverview.cfm/62
i hate the logitech split key, the damn 2x3 keys above the arrows are made into a 3x2, which screws me up.
so, that left me with the "regular" qwerty. as for the mouse, this shape is better.
also, this is a "newer" version and uses USB for both kb and mouse. there are usb to ps2 adapters included, so you can use them on PS2 also. since it's USB, you don't really have to ditch your existing keyboard if you wanted. that is, 2 keyboards for that computer. or 2 mice. and it's radio, so you don't need line of site. you can put the sensor in a drawer and it'd work.
i ordered from buy.com, ordered something else, and used a coupon.