[TowerTalk] another 160/80m rx loop question

[r miles]

I am considering a semi- commercial loop. Sold by a ham. 8' diamond for rx on 160m/80m. I'm using an OCF on 160m at 50' & an 80m half square now. My problem is rx.I work what I hear but I would like to hear better.  I plan to put it on a 5-6' tower & rotate it. I'd use a pre-amp. This will go to my K3.
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What I'm asking is anyone using a rx diamond [pvc with coax inside & a matching network]? What do you use as a pre -amp? Anyone rotating theirs? A pennant or large wire loop is impractical in my case. 8 towers,guys,2 mono verticals and shrubbery is enough to mow around. I want as simple as possible  rx loop.
k9il