[TenTec] Omni VI Plus Question

[Aidehua@aol.com]

I am planning to buy one of these....There are a couple available for sale  
and both are in good shape.  I was told that TT manufactured the VI Plus  from 
1997-2001.
 
TT also told me that the final run had the TCXO as standard.  Aside  from the 
later rigs being newer, are there any particular advantages of one  build 
year over another??
 
My dilemma as that I found one that was built in 1999 and the other in  2000. 
 Which one should I choose??
 
Help!
 
73,
Ed NI6S