So, this is something that I have been thinking about for a while.

The one and only thing that I really haven't liked about XSP is that the girl's voices are too easily distinguishable as some recordings from various pornos. Therefore, I am suggesting (although, I am more or less just curious about the feasibility of it) that instead of using recordings from pornos, XMoonProductions should invest in some decent audio recording equipment, and in some way record their own sounds, whether it be their own if they have females on the team, the guy's girlfriends/wives, or at the very least hire some local voice actors willing to do it.

I'd offer to be a voice actor... but I'm a guy, so I can't really help you out there .

Modders will be able to add sounds to the game using the scripts.

N.b.
We will see what we can do in the voice acting department ourselves.

Glad to hear that this will also be improved!!

I want to know if we can switch those picture on the wall of the gym and the apartment to something else, since too much of realistic girl popping up on the walls, it just doesn't feel arousing once you see it again, since your going at it with a 3D model not IRL Women, it a must. Well for me that is a must.

It's a think they have already done.

I think the developers talked about users being able to code different movies or pictures into the game, and almost every wall. Check the modding section for more info.

Something that will also be awesome to see in XSP, is if the girls actually speak (audibly) while their lips (shape and timing) are synced with the words/letters.

That would take quite a bit of animating time, but it would really take the immersion to a whole new level.

That would be amazing and i totally agree.
If voice acting was to be added would it be for the up & coming release or a later version? Just wondering.