Find max value from 3 cells, return text, but 2 max values same!

Hi,
I'm using a simple formula to find and return the maximum value from 3
compared columns (N, Q & T) and place that max value in column U (same row).
Equation in column U is:

=MAX(N3,Q3,T3)

SK17 EC3 PL2 Max Text
N O P Q R S T U V

3 6 5 1 6
4 6 3 3 6
5 5 5 2 5
6 1 4 1 4
7 5 3 5 5
8 2 7 0 7
9 1 1 1 1
10 9 0 4 9

That works fine but my problem is I want to return a text note in column V
based on which column has supplied the max value. However, if the same max
value is in 2 or even all 3 of the checked columns, I need column V to simple
display an "X", as illustrated below.

SK17 EC3 PL2 Max Text
N O P Q R S T U V

3 6 5 1 6
SK17
4 6 3 3 6
SK17
5 5 5 2 5
X
6 1 4 1 4
EC3
7 5 3 5 5
X
8 2 7 0 7
EC3
9 1 1 1 1
X
10 9 0 4 9
SK17

I'm OK until two max values match but then it all falls apart.
As always any advice will be gratefully received.
Thanks,
Steve.