Question on air exchange for garage studio

[solarpc1]

Well, progress has been steady, but slow. The exterior leaf of the design is completely done, except for the installation of the door/door jamb into my house, which I will be getting to next weekend. My inner room is completely framed now, and over half is insulated, has vapor barrier up, and first layer of drywall up with the seams caulked. Before I finish the remaining portion I'm at the point where I need to frame up the bulkheads for the two air exchanges. But before I do that I could use some advice on the air exchange to finalize my plans so I know what dimensions I want to make the bulkheads at. Here's what my current wall looks like, with a crude overlay drawing of how I intend the air exchange to be situated.

AirExchangePlans.jpg

I do plan on installing a mini-split system for heating/cooling, and will also be putting in backup electric cove heating units since I do live somewhere that can get sub-zero occasionally in the winter months. So I already have that aspect addressed. My questions center around the just air exchange at this point.

I will be exchanging air with the adjacent room, which is open to my entire main level of my house, so this should be more than adequate to get fresh air into the studio. I have purchased two Fantech FG6XL fans (one for the inlet and outlet). Just based on what I see online it seems I have a few things to consider on which organization of components I should use. I plan on using a variable speed switch that allows me to separately turn these on/off and control the rate of air exchange based, so they will only be on if I'm currently using the studio space. Since this will be exchanging air from the neighboring room, I not only need to be concerned with limiting sound traveling through the ducts when playing/recording in the space, but also the noise from the fan itself doing the air exchange between the rooms. I have not yet wired up the fans to see how loud they are, but have read a number of comments about how they can be noisy. Thoughts? I have a couple different options I'm considering, which can be seen in the below rough plans.

AirInletOptions.jpg

AirOutletOptions.jpg

Which layout(s) would you recommend? Also, if you recommend my option 1 or option 2 for either the inlet/outlet, which side makes most sense to have the dead vent on (as in should I flip my component chain from what is represented in either situation)?

When referring to a duct silencer, I'm considering a product like this (namely just to control the noise generated from the fan):
http://www.supplyhouse.com/Fantech-LD6- ... t-Silencer
Some comments I've read state this can be quite effective in controlling the noise from the fans.

And lastly (for now), do you find it wise to just bury the Fantech fans in the wall/bulkhead under the two layers of drywall, etc., or would you install some sort of access door in case the fan were to ever fail and needed to be replaced? Just like all electrical components, I know there is always a given life-span and it could fail whenever. I just don't know if at that point I want to deal with cutting out drywall and doing that repair, or if a built in access hatch makes more sense. Of course, then I'm right back to the concern of having another opening/possible sound leakage point when you introduce two of those doors for each of the fans. One site I purchase supplies from (and the fans) recommends an access door like this where an acoustic panel can be set in its face.
http://www.plumbersurplus.com/Prod/Elmd ... 68/Cat/610 Thoughts?

This is my last design hurdle, and I should be full speed ahead, as funds permit, after I get this worked out. Thanks again for all the valuable input!