What to do...
Yes.. definately a 68060 accelerator.. (Cyberstorm MKIII costs approx 300 EUR)
2 choices for peripherals:
--Choice 1--
Network, Personally I use na X-Surf 3.. Around 100 Euros for that
Graphics... If you get a cyberstorm mkIII or cyberstorm ppc then get a cybervisionppc, great card

Otherwise I hear that a Cybervision 64 is the next best thing..
--Choice 2--
Step 1) Buy a mediator... Approx 160EUR from elbox directly
Step 2) Get a voodoo 3 [PCI] (Or 4 or 5 I guess.. but I hear the 3 runs better) approx 50EUR?
Step 3) Get a supported network card.. [PCI] (Cheap.. maybe 20 EUR?)
Step 4) Get a Soundblaster 128 [PCI].. ebay for maybe 10 EUR?
Optional Step) Buy a spider USB 2.0 Card for usb ports
Step 5) Play

Personally I took the 1st route, but my friend took the second.. Admitedly his machine runs 3D apps better than mine, but I had more fun finding classic hardware ^_^