ok thanks
Net bat is always a good idea. I'd only use my match bat in nets if I know exactly what balls are being used and if they are good quality ones.
Try and get the same profile as Will said but bear in mind the costs as it is only a net bat after all.
I am not very fussy, I use 2 similar profile match bats (and have a 3rd Pakistani one like it - that's a gun!) but use a Kookaburra Kahuna Chaos which is a different profile to them but it's a good bat too (though it will fall apart very soon - delaminating...).
All up to you mate, whatever you use in the nets make sure that the practice pays off