all of those scs's do the same thing the same way. they are all good. pick which one looks better too you.
as for bearings, you want really good??
http://cgi.ebay.com/8-Skateboard-Bearing-608-2RS-Hybrid-Ceramic-Si3N4-VXB-/150218347779?pt=LH_DefaultDomain_0&hash=item22f9b61503#ht_2186wt_905