I've got a burning interest in getting back to the Amiga. I was an Amiga 1200 user many years ago and enjoyed the delights of fast Cad drawings, desktop publishing and just pure fun.
I'm looking at all the options and was wondering if I'm just hankering back to my past or is there a real bonus in using an Amiga today.
No, you're hankering for your past...but that's not always a bad thing

If you want a 1200, you can still buy them new at
AmigaKit or you can track down a 2000/3000/4000 on eBay if that's more your thing.
You should also checkout OS4/Morph/Aros/WinUAE.