$5-7k can get you a nice B-series with a loader if you are patient, and wait for the right deal.
Some of the recent deals in my area (I'm near Harrisburg, PA, and was looking in a 250mi. radius) that I missed, or passed on while shopping for an upgrade over the last few months:
Ebay:
B1750 w/ Kubota 1640 FEL, 1300 hrs, $5300
B2150 w/ Bush Hog loader, 412 hrs, $6200 -- was bummed that I missed this
Craigslist:
B2400 w/ Kubota LA351 FEL, back blade, and 14' trailer, $8k -- was also bummed that I missed this one
Various BX models w/ FEL and various implements have been listed for $6800-$11,000
What I ended up buying:
'05
B7610 w/ 124 hrs, with (Kubota) LA352 FEL, Woods PHD & 9" auger, and King Cutter XB-series 5' landscape rake, $7,500
If you're going to be doing a lot of FEL work, you'll want a hydrostatic transmission, and power steering (which all the above have, that was a requirement for me).