Looking for advice...

I just bought this great Jamis Dakar mountain bike from Catrin (http://forums.teamestrogen.com/showt...203#post676203), but at the moment, I really won't be riding it off road much as we're house-sitting in Kansas City where there is lots of city pavement. We do plan to do some traveling where the knobby tires will be needed, but for now, what I'd really like to do is use it for urban/utility rides (like to the grocery store), as my Bike Friday is back in NC (just couldn't fit SIX bikes into our CR-V, though we did manage to get four into the back!) I do have a wonderful Trek Pilot road bike, but sometimes it's nice to be more upright, and my DH will be riding his MTB with slicks on these types of urban/utility rides.

So, I was thinking to get some slicks to put on it, but I wondered if it would be simpler (albeit more costly) to buy an inexpensive wheelset and change wheels when needed instead of tires?

I would think wheels would be a lot easier to change than tires (yuck!), but the bike has disk brakes, and the new rear wheel would need a 10-speed cogset, I assume, so we could be looking at quite a bit more money.

Has anyone been in this situation, and if so, what did you do? Advice/opinions appreciated!