Motorola, Vertex, Kenwood and Icom all make quality radios. Based off the EX500/HT-750 you listed above, you are probably looking at low to mid range commercial quality radios. There really are a lot of options available.
If you are pricing out radios, make sure you look at the total cost of ownership. The radio on it's own is only part of the cost. Batteries, accessories, antennas are all considered 'expendables' and will need fairly frequent replacement. It can really add up over time, so make sure you consider those costs.
I've got a maintenance group at work using Icom F-4011 radios. We've been buying them for somewhere in the $150/each range. 16 channel UHF. They get beat up pretty hard and are doing well.