i have loved my dvx now for about a year with no problems it is a great camera i dont think fx7 has progressive recording and the dvx does i would say go with the dvx
how about the new sony fx1000. it has a progressive scan mode 24p/30p. very good in low light (you know how sony like). i think it is priced just like the dvx100b and you'll have a high def cam (HDV). but it doesn't have xlr input.