Have you considered some fruit trees? Even blueberry bushes are great and give beautiful winter color.
As far as the evergreens go, you've got many choices. How do you plan on acquiring the trees? How many do you need? You could contact a local grower. Sometimes they can sell direct to the public.
(short story.... I've had people drop in on me and waste so much of my time, sometimes an hour or two. I have a hard time being rude. But it just is not worth having strangers over to my place for 2 hours and a seventy-five cent sale)
So if you go that route, if you know what you want, it'll be easier. Now alot of gardening type folks are really more than happy to spend 1/2 day with you. They have employyees working and good cash flow and just like to talk. If you ask just to look around, then it's up to the grower.
Another way to go is mailorder. This is iffy, ya get what you pay for. I have had mostly good experiences with mailing in stuff.
Another way is to decide which species of trees/shrubs you want and go to your local garden center and ask them to order em for you. Monrovia in CA is a wonderful place but has minimum orders by the truckload. They may also tag up the price to retail.
I hate to say this, but this may be one case where a good book may be the way to go to find that special set of trees.
Here's some info to find some conifers, it's a site I've perused and I am not connected to in any way.
http://www.fantasticplants.com/
Also, just a tip. The weeping trees are pretty neat for a specimen tree.
Please tell us ifn ya want more info..... and keep us informed on your wife's choices!!!!