2000 XC Rear Wheel Bearing

[pjg01930]

145K on my car. Getting rear shocks/springs and rear rotors and pads replaced soon. Was considering replacing rear wheel bearings while in there. The bearings are sold individually, without the hub (unlike the front hubs, which include the bearing in the assembly). Not many places even sell the AWD rear wheel hub, but all Euro parts sites sell the AWD rear wheel bearings...
AWD rear wheel bearing:

http://www.fcpgroton.com/product-exec/product_id/18551/nm/Volvo+V70+AWD+Rear+Wheel+Bearing+%281998-2000%29

Rear wheel hub:
(Also available at Tasca Volvo for a few bucks cheaper, but they have pic here)
http://www.usautoparts.net/catalog/index.php?N=11879+4294963365+1733+11921+4294952374 +4294963336

So, I guess my questions are how hard (or possible) is it to remove old bearings from hub and replace?
Can I just get new bearings and snap rings, or do I need to buy new wheel hubs for each side as well?
How much extra labor would be involved vs. just rotor/pad job?
And do the hubs themselves fail typically, or just the bearing (which from reading the forum is quite common)?
Any knowledge on this would be great. I am not doing work myself, have a mechanic doing it. Thanks.

[cattlecar]

Those wheel bearings last a long long time and are not noted for failing. They are somewhat labor intensive to change. I wouldn't do it pre-emptively since there is very little savings from doing it combined with a brake job.
I think the second listing would end up with you receiving a rear hub unit for a FWD model.