I've tried both and like them both. I'd say test the emulation first on your old pc to see if it does the trick for you and your family. It would probably end up being the cheaper solution.
Speaking in terms of "older PCs", WinUAE works very smoothly on my 2.3 ghz 4gb PC with a nice sound card. However, it does poorly for me on a plain mini-itx VIA 1ghz with 1gb RAM. I'm just saying this because I think we have the mindset that underpowered pc equipment should be able to run emulated Amigas without problem. I'd say, the better the pc, the better altogether.
