A couple few thoughts here.
-I don't really know Delaware Bay very well. I mostly know it from the beaches at Cape May, Lewes, and Rehoboth, the Cape May Ferry and a single daysail out of Cape May. I have seen it dead calm with slight (6"-1 foot) residual swell off the Atlantic and I have seen it with a 6-8 foot breaking chop that made the motion on the ferry noticeably uncomfortable.
I have also been surprised by the parade of ships coming and going from the river. (There are a slew of ships and tugs on the Chesapeake too, but not as many as seem to come and go on the Delaware. On the other hand, those ships are confined to a narrow channel so you really need to pay closest attention when approaching the channel.)
-In terms of small swing keel boats, I have a fair amount of experience with Macs, Ventures, and Catalina 22's. I would strongly recommend that you drop the Mac's and Ventures from your list. The build quality on these boats was quite spotty, and compared to other options out there, their sailing abilities in both light air and heavy air are not as good as some of the other options that are available for similar prices. In the conditions at both end of the wind range that Delaware Bay can dish out, the Mac's and Ventures would be a pretty poor choice.
-Build quality on the Catalina 22's seems to be noticeably better. The sailing capabilities also tend to be better than the Mac's and Ventures as well. But these are an older design and yacht design has improved enormously in the 55 years since the hull and rig of the Catalina 22 was first penned.
-I suggest that Beneteau has done a much better job in developing higher quality small swing keel boats than either of those two option. To begin, the Beneteau swing keel boats have been typically designed by world class yacht design firms with a focus on producing boats that sail well in a broad range of conditions. I have been amazed at how refined these small boats really are as compared to earlier swing keel boats from the 1970's and 1980's. My impression is that the build quality of these boats seem to be several steps up from either the Mac's, Ventures, or Catalina 22's. The boat that I have the most time on and was most impressed with is the First 235 SK. Other good choices within the Beneteau line-up would include the First 210, and First 211. (Information on older Beneteau models can be found here
Sailing Yacht Heritage | ç
)
- Recently, I have been taking people with disabilities and children from under priveleged communities out sailing with CRAB (Chesapeake Regional Accessible Boating) on Beneteau First 22A's. (The A is for accessibility) These are a more modern design. I have found them to be very nice boats that sail well and seem to be quite rugged. ( I believe that there is a First 22 with a smaller cockpit and more accommodations,
First 22 | BENETEAU.)
-If performance is your thing, then I would try to find a something like a Santana 23 D, Tripp 26, or Beneteau First Class 7.
Jeff