UHF Radio Mic

I want to get a Radio Mic to use while DJing, as I am getting feed up having
leads trailing everywhere

I have been looking at the Samson XLR snap. Although I have a couple of
concerns.

Should I spend the extra a get the True Diversity, even though most of the
time I am going to only be a few meters away from the receive, and never
more than 30ish if I go into the crowd.

Should I stick to the policy of don't use radio unless you really have to.

I have also looked at the AKG SO40 but AKG seem to have a problem with
supply in the UK, ie have don't currently have a distributor.

So....
Is True Diversity worth the extra money, for me?
Should I get the Samson or the AKG?
Or should I simply stick to good old XLR cable?

Any thoughts???

Cheers Mark