Here's
another thread asking about the same question.
I have a BC245xlt that I got new in 1999. It is a nice unit and was often by my side these 6 years. However, when I heard about the 246T, I was interested. I got mine a little before Christmas.
I don't think I've turned the '5 on since I got the '6. The '6 is pretty much equal or better in every way.
I'll admit that the new dynamic programming scheme did throw me for the first few hours. After I had the breakthrough mental click, I realized its really a superior way to manage the scanner's memory. Its not difficult to do, the learning curve is just a bit longer.
This is my first scanner with alpha tags. Wow. I've been missing this for years and never realized it! Man, when I think back to trying to remember all those talkgroups numbers on a busy TRS...sheesh. Never again!
If you go with a 246T, I really, really recommmend
the ARC246 software. Read the 246T manual to get the terms down (like system, group, quick key), then use the software to make a system.
I'm a bit on the fence about the batteries. I like that they are regular cells but I wish they lasted longer. I just keep 2 pair and always put the dead pair into the charger as soon as they are dead. I suppose if I had to choose between the small size and 2 extra batteries, I'd go with Uniden's choice of size priority.
Really, if you like the BC245xlt, and you can wrap your brain around the programming, you will really like the BC246T. In my opinion, its quite a bargain, too.
PS...
Here's my advice for an antenna