I've found that most Jumbo bodied guitars have a tubby sound to them and just generally feel awkward to me. The only Jumbo body guitar I can think of in your range that is worth mentioning are the Epiphone EJ-200. You have to be careful in seeking this guitar. Many dealers tag the Epiphone Jumbos as "J-200" to attract those who desire a Gibson J-200. I know of at least one corporate based retailer that did this with Epiphone's cheaper AJ-200. They tagged it as a J-200 and had it priced above the MSRP of $249 but below the MSRP of the more expensive EJ-200, effectively misleading unsuspecting buyers. The AJ-200 was discontinued by Epiphone, but is still in stock at some places.
Check the label inside the guitar, to make sure it is an EJ-200, if you are hell bent on getting a J-200 for under $1000. If this is the case, you may also want to take a look at used Gibson J-200's. They can sometimes be found for a little over $1000 used. The only other Jumbo that you can get used for under $1000, that is worth mentioning is the discontinued Ibanez AJS1180ECENT Artwood Series Jumbo Cutaway Acoustic–Electric Guitar. This Jumbo has a cut away and has a pickup. I am not certain if that is desirable to you or not.
Taylor and some other smaller high end guitar makers have some nice Jumbo guitars, but unless you get extremely lucky, you're not going to find a used one for under $2000.
You may want to re-think as to why you want a Jumbo. I can honestly only think of a few great guitar players that use them. You usually see Jumbos being strummed on by country singers, just using basic chords. If you just want a guitar with large bout, you may want to consider the Taylor 214 series. They start at $799 and come in several varieties. If you are just looking for acoustic volume, it's not always the body size that does it. The Selmer-Macaferri "egg hole" Design is probably the loudest acoustic guitar out there, but these have a quite small body, compared to typical acoustic guitars. I got a Gitane GJ-10 because of an interest in Gypsy Jazz, but due to it's exceptional tone and volume, it has become my go-to acoustic. You can get these with a hardshell case for around $500. I like the sound and feel of this guitar far better than most higher end acoustics that I have personally played.
So, think and try before you buy. A guitar's brand, style and price does not always determine it's sound.
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