I think you have to decide between a LWB and SWB bent, as these appear to be the most common for long distance touring.
You can read reviews on many different bents at Bentrideronline e-zine.
http://www.bentrideronline.com/
If you decide on a SWB take a look at Radical Design rack bags and panniers.
http://www.radicaldesign.nl/en/products.html
These products are specifically designed for use on most SWB bents.They also have a decent trailer for those looking for additional payload.
X-eyed is just now delivering mid-ship racks for RANS SWB and TourEasy LWB bents.
http://www.x-eyed.com/rack.html
Good luck and Happy Trails 2U!
Eddie