I don't remember if the Switchback had the same cam as my '96 Conquest Pro(MaxCam) but I do know that,having shot both,they were similar in their drawing/breakover characteristics. Mathews still offers the Conquest using the MaxCam:
http://mathewsinc.com/mathews-bows-11255-44-ViewProduct-1386-324.asp Being a fingers shooter I opted for 65% let-off as,at least for me,80% let-off was too much. I shoot right at 60#(bow max's out at 63#)w/a 27.5" draw length. With a 361.2gr arrow I chrono 265fps at 56.3 ft.lb. I certainly don't see why at 70# and shooting a 375-400gr arrow you couldn't achieve the speed/energy you want with a Conquest 4. Plus at 5.4-5.8 gr per lb the bow would be quiet. I use no stabilizer and a small puff ball at the cam end of my bow and it is QUIET.
I just thought that since you liked the Switchback so much I'd pass this info along.
