Need help choosing a new coil

[wheatfinder13]

Hey y'all,
Latly I have been more interested in hunting parks in search of older coins in exchange for 1930s private properties I've been hunting with the standard coil with great success but I want to hunt the older parks that have a lot of trash, what coil should I buy? I have a teknetics alpha 2000, thanks

 

[christo000]

I my self would go for a smaller coil it'll be alot easier for you when scanning the ground between good targets & trash I have smaller then stock for my v3i & my Atpro for that reason my choices have need the dd coils If I cant find a nice sef coil

 

[relicmeister]

I'd go with a 5" dd coil.