...can explain a good amp/guitar in a given price range that has a good jerry sound.
If you mean, least expensive...
Having checked out some of the Tele's with humbuckers last week, I would say the least expensive one is the Squier Tele Custom.
This struck me as having a Twangy Jerry tone, again, think intro of Big River.
http://www.musiciansfriend.com/product/ ... sku=515113
For amps... there's tons of inexpesive Fender amps on Craigslist.
I've never had an issue getting Twang out of any Fender amp. Just buy the amount of power your gonna need for the job.
[note: I have had trouble getting enough bottom end full/lush-ness out of some Fender amps, but not treble/twang].
I've been using a Fender Blues Jr (1x12), in stereo with a Fender Princeton 60 (2x10), with the Tele Thinline Deluxe (because that's what happens to already be there at the guys house who hosts the jam).
Sounds great for twangy Jerry.
Another song I've jammed on lately that have the twang factor include Box of Rain. UJB qualifies for some Twang tone, too!