I would think an early GX should fit into your price range or the 4R. But I'd personally go the GX route even though the aftermarket does not embrace it. We plan to replace our Subaru with one as soon as funds allow a cash purchase.
If you have not seen this take a look: http://forum.ih8mud.com/120-series-t...003-gx470.html
There are a couple other good builds on MUD or search on www.toyota120.com
for either 4R/GX
Model year changes to GX470: http://www.toyota120.com/html/lexus_gx470.html