if you really want either clip or tanto and nothing else, then you might want to check out the folder line-up of MOD (masters of defense). the 875-series is particularly nice. other recommendable brands would be Benchmade and several others
if you can wave the blade-point design preference then get an AMK Sere 2000, no competition for its price whatsoever.
other sugg's would be a TOPS CQT 711/747 or a (Buck-)Strider, but those knives would probably not fit your 'not too heavy' criterium