[Elecraft] K3 question--TCXO or another filter?

[Steve Ward]

Greetings all,

I'm getting pretty close to the time I'm expecting to see a Katiegram, 
and I'm thinking about adding either the TCXO or the 6KHz filter to my 
order.

I do a lot of PSK-31 and I'm wondering if most folks find the stock 
oscillator sufficiently stable for digital or if the TCXO is better to have?

Thanks for your advice,

Steve
AD7OG