Delta M14 chassis? The one Wolverine Supplies is selling?
I've played with one a bit, and for the $350 (ish) that it's selling for, it's priced about right. The BF is much more rigid and tougher and worth the extra cost, about double of the Delta. You get what you pay for. Both systems require a buttstock of some sort. The delta only takes Mossberg 500 stocks but the BF comes with the "standard" AR buffer thread, the Mossberg adapter is an extra cost iirc.
The Delta chassis is made from a polymer (plastic for lack of a better term) that is much better than the OEM plastic stock that comes with a M-305. It is more-or-less a drop-in fit, but some material needs to be removed under the reciever shelf and the connector lock would need to be swapped or filled (popsicle stock or devcon).
The Black feather is aluminum and requires a bit more mechanical ability to instal and set-up. Read the instructions 2x!
The Boyd's option is great if your looking for that "authentic" wood look. At about $225 deliver to your door it is the cheapest option of the 3. You will need to rob your stock metal from the OEM plastic (or wood) stock.
Personally, I like the look and feel of Walnut, but the BF is pretty much the cheapest option for a "real" chassis for us canucks.
John