I have an extremely limited space in which to set up an antenna in the backyard and I am on a very limited budget...so towers are out of the question. I am installing a 10' 4x6 post as a base mount for a vertical antenna and using 10-20 foot aluminum masts to attach the antenna to. No space for ground radials...so I've been looking at the R-8 or the AV-640 for 40-6 meter band coverage. Yes I know, these are compromise antennas...but I gotta work with what limited space I have. Any opinions on either of these....or something else? Thanks in advance.