What about trying 17" alloys up front to raise it a touch?
You'll struggle to find OEM 17's but there are other options, in fact I believe a couple of members have a spare set of volks which they'd consider selling.
I bet you scrape on the steeper bit between the concret and the floor of your garage.If you had this part resculpted 10-12"'s further back it looks like it would reduce the slope to the same angle as the council tarmac. I'd go down this route if you want OEM wheels as it would be a lot cheaper than replacement suspension. If the problem is getting onto the kerb then try leaving some chocs of wood there... unless you live in a really pikey area I'm sure they'll stay put.
Well done for taking the plunge when doubts were floating, you only live once!
L*