I did very well in trashy parks with the big 15" WOT coil which truthfully surprised me since I thought it was mostly for open areas...fields...etc...WRONG.
The WOT coil can be a killer even in smaller parks.
For an everyday coil though...honestly...I would go with either the SEF coil or the minelab pro coil.
Here's a a bit of a tip and what I found here in my IL soil. When comparing the pro coil and SEF coils side by side....for me the 10 x 12 SEF coil hit harder on deep coins...locked on better...ID'd better at depth...was more stable...and I could run it hotter.
All that being said...I found some very nice coins with the pro coil...still do...but the 10 x 12 SEF coil is the coil I use 99% of the time for an everyday coil.
For some reason...it also loves injuns...and just seems to find 'em.
One thing I disliked about the pro coil is the fact that I seemed to dig quite a few "ghost holes" with it. I mean it would be a perfect signal...repeat all the way around the hole...etc. When I dug the hole however...nothing there.

It happened so often in fact that I just stopped using it.
I don't have that problem with any other coil...and it hardly ever happens with the 10 x 12 SEF coil.
The one advantage the pro coil has is it's weight.,.or lack thereof...it's LIGHT. That is a definite plus for a coil that is as good as it is. I found some very deep silver dimes on edge with it...so don't get me wrong..it's a great coil and I do use it some.
Seriously either coil is a winner