I've had the Monroe Severe Service up front and coilovers in the rear on three different wagons. The ride is firmer, but not harsh in the least. What you notice most is improved handling, and you won't be bottoming out the suspension from ineffectual shocks; which is where "harsh" really comes into the picture. The ride on my worn OEM shocks felt like some gremlin was hitting the underside of the car with a sledgehammer on rough roads.
Monroe shocks are relatively inexpensive, and the better grades hold up well under extended use. You can buy them online, have them shipped to your door, and bring them to just about any independent shop and they'll install them. My local Monroe shop is staffed by doctors who can perform a radical cashectomy on your wallet. The independent shop I use put all four shocks on in about 90 minutes while I waited.