I installed a Sportivo strut brace on my Altise, and in my experience I found the strut brace to make not that much difference, but it may just be me. Unless you’re the sort of person that likes the push the car to its limits I wouldn’t worry. But if you do want one, get the whiteline adjustable brace, as it would be stiffer that the Sportivo one I imagine, unless you can get a Sportivo one from a wrecker. But in regard to the sway bars, I highly recommend you get one, it is the best bang for buck handling mod you can do for sure. There are two 20mm bars made by whiteline, the BTR39 and BTR39Z adjustable which is what I have. I also have a front adjustable one which is no longer on the site, so not sure if they are still made, but I found that to make a good difference also. I have seen the Gen 5 on coilovers before in Aus, so they must be available, but maybe a bit of overkill unless your wanting to take it to the track. So alliteratively you would be best lowing it on some King springs and maybe KYB struts or some other brand.