I own 27 spydies and 3 byrds so far, the byrds are my heavy work knives and are used much harder than any of my spydercos. My pelican was used to cut everything from cardboard, paper, binding straps, rope, coard, cable, wood, shrink wrap (for boats), and heavy plastic. It ate through all the above listed materials with ease. IMO for the $13 i spent on it, it has served me better as a work knife then most other production knives ive used. So on that note i would say not to sell byrd knives short because of their chinese roots. Look into a Cara Cara for a good all around work knife.
i think the Delica 4 is a great choice, and it will certainly help you decide if you will get more. the delica is a real champ at giving you top quality materials in a low budget platform. My first one was purchased on sale for $30 and since then i have bought 2 more. I gave that first one away to a friend, and my father EDC's one of the other 2 often. Both of them are very pleased with the performance they have gotten from theese small folders.
J