I have the 163, and love having the alphatags and PL/DPL. No problems with 'lack of selectivity' on the VHF hi-band portion. Monitor many conventional frequencies and live near paging towers. Check on the database here on RR and make your decision based on what you wish to monitor. Personal preference, of course, is the final common denominator

Now I just need to add a 197 to augment my scanning pleasure!
Larry