Daniel, I'm by far not your biggest fan - but go for the Sprinter, you'll thank me later - if you buy one that's not been beat up and abused.
1 - You can easily get a gently used 07-08 model year 170 2500 for 28-30k, gently used 07-08 year 170 3500 for 31-34k. One with 70-80k on it, if maintained, is like buying a domestic with 15-20k on it, and the big depreciation hit was taken by the former owner, not you.
Heck, you can get the 158" 05-06 with 100-120k miles for $20-25k, and they still have loads of room.
Don't let mileage scare you, I sold the body of a wrecked one to a guy who towed it away with an 03 sprinter with 580,000 miles on it.
2 - What you will save in gas makes the payment.
3 - With the tax incentives to make large purchases you can currently enjoy - it's a no brainer.
You wouldn't believe the amount of gear we get in our 170"ers, 30 am's, 2 dehus, on top of all the ccing gear, and the vans don't flinch at the weight. FULLY loaded you are not going to be starring in fast and the furious 27, but they are not struggling by ANY means.
Yes, the Nissan is new, and some people like the look (I personally am not fond of them) but research the MPG, and do the math, might as well get a box van.
As far as ugly, the newer sprinters are our most complimented vans we have ever had in our fleet - almost every custy comments on them.
Are you looking for a whole new rig, or just van with plans to transfer gear?