I have heard that the 436hp/536 is a great radio it comes down to if you like the memory card concept. I have a Pro 107 with a memory card and I personally don't really like it thats just my thoughts on it some love the concept. The 325/996p2 also are great as well. The only complaint about the 325P2 is the battery life per the reviews I have came across. If you are wanting to listen to Okc Fire, Yukon, Warr Acres etc that are using Provoice then one of these four radios is the best option. The Provoice upgrade cost $50 and DMR cost $60. If you have no interest in anyone on OKC system using Provoice then the Whistlers come into play however they both use memory card concept which is again a personal preference. The Whistler do come with DMR for no additional cost. The Unication is more a public safety type radio/pager they do receive tremendously better however they don't do Provoice/DMR or P25 phase 2. They are going to be releasing a phase 2 upgrade that will be a paid upgrade. I have heard that OKC stuff that is provoice will be going to P25 Phase 2 but not sure how soon maybe someone on here could give you a little better idea on that? Hope this helps a little!