I have almost decided to go for Samplitude but I am facing the
following problem. Any way how to overcome it ?

After much trying I found how to connect the Lexicon reverb to
Samplitude. Apart from Aux I have to create an extra track just for
monitoring the Lexicon return (well, comparing to Nuendo and ProTools
it is an extra step). The real problem is that during mixdown this
reverb is NOT recorded (unlike ProTools) and even the TapeIt plugin
does not record it (unlike Nuendo). Does this really mean that I have
to RECORD the reverb as an audio track before mixdown ? It would be
terribly incovenient for me and would probably prevent me from going
for Samplitude. Any way how to include the external reverb directly in
the mixdown ?