The eggs are wonderful but the flip hole is in a completely different league so it all boils down to how much you want to spend.
Also from the TENGA line, the latest 3D range does a great job of splitting the difference:
http://search.lovehoney.co.uk/search?w=TENGA+3D&view=list
Considering the price the pack is, why not get a flip hole and a single egg?