Depends on what you're using it for and your needs really. If it's for a simple analog 16 channel max operation like a business you can look into the CP line. If its an emergency service application I would look into the xpr or apx series. If you're just needing conventional analog the apx is a bit overkill.
What type of digital are they using?
Is it digital trunked?
There are a few different types of digital that are used in public safety systems, P25, NXDN, DMR, etc. They are not interchangeable, so you need to know which one they are using.
Also, digital makes it really easy for them to use encryption, access controls, etc. so before you spend your hard earned money on a digital radio, be sure you'll be able to use it on their system. If they are running encryption or any sort of access control, you won't be able to use your radio on their system without them letting you.
And, as always, if you are going to use your radio on another agencies radio system, you MUST (FCC rules) have written approval from the license holder of the other system. They are the ones that are responsible for the operation of their radio system, and someone else adding radios isn't OK. There is no exception to this rule for public safety agencies, volunteers, hobbyists, etc.
Our system we are dispatched on in analog and out neighboring mutual aid uses p25 digital system. We got a grant for new radio equipment and weighting options of sticking With Motorola or going with Kenwood TK-5310 or the NX-5300
Only problem with the XTS series and XTL while parts exist and third party shops fix them they are soon to be eol from motorola depot and flash upgrades are pretty much over unless you find someone out there with them. Public safety is moving to the xpr and apx lines. Just a thought to keep in mind is unless you got a local tech shop your on your own with them.