[Elecraft] Rookie help cry : A or B PCB , version C or D , firmware 2.01 or 2.04 ?

[PE1E]

Being brand new to the K2 I got confused about the revions C D E F.
As well as about the " A " and " B"  PCB.
As well as about the firmware v2.01 and v2.04.
.
I searched on Elecrafts site as well into the archives but cannot resolve my
questions properly.
Please help.

1.
Does ( a S/N 2004 with the ) " A " PCB ( is this Rev C ? ) offer serious
drawbacks compared to the newer " B " PCB ( is this Rev or E ? ) ?

2.
Does firmware v2.01 offer serious desavantage compared to v2.04 ?

3.
If Rev C with firmware 2.01 would be essentially inferior to the B PCB with
version D and firmware 2.04 what is the cost and trouble for updating ( if
possible at al... ).

4.
Do the DSP option and the RS232 option work properly in the " A ", board
with the C version under firmware v2.01 ?


I tried to check lists of differences between the " A / B " PCB as well as
between the 2.01 and the 2.04 firware version, but really got lost onto the
oververwelming documentation.

I would be grateful for any comments.
On that basis I must decide to buy a " A " PCB with v2.01 or not.

Peter, PE1E