Sounds like great progress Adam

If you do go with the rear swaybar, you should look at getting some HD mounts to reinforce the existing OEM mounts (and reduce risk of them snapping due to thicker swaybar).
AVO world sells GenV specific HD mounts (note gen4 mounts do not fit)
I just bought my pair via Henry (rrussh) - will be putting them on soon at the same time as my rear brake upgrade
Re exhausts, for a while I was looking at something quieter than my HKS premiums, I saw these on dazzz's forester (I was getting some flak from my wiser half that the HKS premium were too loud - until Matt fixed up the exhaust noise a bit)
They are the Prova by Fujitsubo black stainless mufflers - the black finish looks good, and sound like they are quiter and less boomy.
https://www.youtube.com/watch?v=r5utcsETtuEAlso check out Gav (Omega5) build thread
viewtopic.php?f=10&t=25898he has upgraded his stock muffs to 'Apexi HYBRID MEGAPHONE Evolution'
https://www.youtube.com/watch?v=eqKSslc7DXE