"Consumer Reports" has a very recent issue on computers. I'd look there. Have her look at monitors, keyboards, and mice in any local computer store to find out what looks best to her at price points and which feels best to her fingers. I like the ergonomic (bent in the middle) keyboards a lot; some don't. I like a big mouse; the Mrs. likes a small one.
For any on-line purchase, do a search for a discount coupon from the seller. We just bought a Lenovo Thinkpad notebook (like it a lot), and with the Lenovo on-line discount plus a discount coupon code it was $555, a bargain for what's in it.