The truth is... Nobody can tell for you is it worth your money or not. Go, tinker a bit, play with your new hardware ant decide. 79 EUR may seem steep, but well, back in 2008 I've payed 100 EUR for a license for Efika 5200B (call that a bargain!). So far every update since 2.0 was free of charge for all registered users. And thats nearly 10 years now.

P.S. I hope your Mini is a 'silent upgrade' 64 MB VRAM one. It will give you a much better experience than the 32 MB version.