I've been looking for 2226's for awhile for some Pro 4 Pi's. I haven't been able to find them for less than $200 each. If they can be had for less, it'll probably be in an auction/sale/one-time thing.I don't know how the JBL2226 & Delta 15 compare, as I've never heard either, but take a look on the price page at the dimensions. The Delta needs a much larger box.
I was on the fence between the 2226 & Delta, but given the size of the boxes, I pretty much have to go with the 2226 now. The box for the Delta's is just too big.
Charlie