In reply to stickonthewall: A top tip from a climbing partner of mine:
Adding two ice screw clippers to a standard 4 gear loop harness works really well for trad. You can rack 4-5 short extenders on each clipper which means you are then not overly constrained by just having the 4 loops. You can do this with the majority of modern all-round harness.
As for which harness to recommend, my only advice is try lots on. If you are a fairly standard body-shape then you shouldn't have any shortage of options. Equally if you are a 'non-standard' body-shape, like I am, then you will struggle.