You have just said it exactly, That's why I ordered a Redline after thinking about going all out on an R8, 25k difference not worth it.
I could easily spend half that amount on mods and have a better car which is what I have planned. If you want looks and status then HSV, You want best bang for buck then Redline and mod it later when stock gets boring.
Bose audio,Sunroof would be extra on the R8 as well. Redline wins against the normal clubby without even trying thanks to all the latest gadgets inside, Need to move up to R8 if you want something that compares to Redlines tech, I just love the HUD, should be standard on all new cars. Never have to look down at gauges. Redline is roughly 60k driveaway, R8 with 340 pack is around 85k. Bolt on charger to redline and you already kill it, rest of cash spend on upgrading the brakes, gearbox/transmission etc etc