I dunno if they're phasing them out or not mate, it says the CSR is available on the aus version of the site. It does say out of stock on the GT3RS V2, but I guess you could contact them to find out if you need to order them in advance or something.
The CSR and CSR Elite pedals are out of stock on the aus site, but again, you could contact them to ask. They still have the discount bundles for the CSR and GT3, which both come with the standard CSR pedals (non-load cell). The GT3 bundle is $250au and the CSR bundle is $300au.
As far as I understand it, the base is the same on all porsche wheels, and the CSR Forza wheel uses the last version of that base, so it'll be the best built out of them all. The CSR rim is also lighter than the Porsche ones, so you'll get better response and a more subtle feel from the FFB. That's why I decided the CSR was the go. For the price I think it's gotta be the best wheel on the market, bang for buck wise.
As far as if you're missing something, no I don't think you are. If you bought a CSR, with CSR Elite pedals, you'll pay less than either T300 or G29 for a wheel base that from everything I've come accross is pretty close to the FFB quality of the T300, with less reports of reliability problems, and a mostly metal constructed 3 pedal set with a load cell brake, so another league to the G29's or T300's pedals.
The only downside I can see is you won't have the menu support of the officially supported wheels on ps4. Personally I can live without it, as every dev will add support for Fanatec wheels anyway, and I never used a wheel to scroll through the ps3's menu, I always used the ds3 for menus and the wheel for the game only.
Edit: Here's a couple of reviews for the CSR. The only real gripe anyone has is the plastic top part of the rim, but I plan to wrap mine, in either a carbon vinyl, or more likely, I'll cut and shape a leather wheel wrap to fit, glue it at the edges and stitch it at the inner seam.
Last edited: Jul 26, 2015