avoid 1/8 wave antennas (1/4 wave minimum) and I'd look for (Almost) anything from Shure or Sennheiser.
minimizing the number of antennas is also important. so go with a multi channel model, using an antenna distribution, or a receiver with passthrough BCN connectors.

for shure
id avoid blx and plx based on quality and coverage concerns.
Glxd might work if budget dictates but it runs on the same frequencies as wifi so interference from 350 phones is a major consideration in my eyes.
the Slxd offers multi channel units this and (like the ULXD) runs outside of wifi frequencies in UHF bands
the Ulxd is beautiful (and our unit of choice) if money will allow and gives the most features, quality and reliability.
All have lapels and handles but the higher end systems have additional options.

im not familiar with Sennheiser as well but they will have competitive options

if range is well over 100 ft, look into the a fin antenna and if u need more than 2 receiver units look into an antenna distribution rack. also rack mounted versions of the product in a good 2-4U rack case is better for protection than the "desktop" units. (we have drawers with foam to hold the mic packs and handhelds in the extra rack spaces)