Use a wood grain laminate for a super strong finish.
Laminate would be very nice, but I think I'd be just as satisfied with vinyl so I was hoping to save a bit of money.
Use cabinet grade (A-1) prefinished plywood.
That's a good idea, though I'm not sure I could find a local source, and even if I do, I imagine it would be expensive.
Was suggested to me to look at wood veneer. Could be an option.
I looked for veneer a bit, and couldn't find anything wider than 24", though admittedly I didn't look that hard, so could be an option.
This place is good for vinyl, I order from them a lot.
I looked the 3m wood vinyl comes in 48" width.
http://www.metrorestyling.com/3M-DI-NOC-Wood-Grain-s/19978.htm
Thanks, but that would cost like $350 to do a 5 foot tall cab.

On my scratchbuild woodgrain cabaret I just bit the bullet and built it out of high grade plywood and stained it. Fits right in with my other woodgrain cabinets.
Heh, it did occur to me to just do it the old fashioned way, but I've never stained before and was hoping to avoid the extra work.

How much more of a pain is it to stain something than to paint it?
The more I think about it, I'd really love to have the woodgrain rather than paint, and having seams because the vinyl isn't wide enough would probably look kinda cheap and crummy. It's looking like staining could be the best option in terms of cost and results.