Looking for Advanced Custom Fields

Hey there WP users.
WP has a system of Custom Fields where you type in a blogpost and you can add custom fields to that post and the same to later posts you make.

E.g. I review a bingo site.

Post 1 – Fun Bingo
Custom Field
Bonus Deposit $100

Post 2 – Happy Bingo
Custom Field
Bonus Deposit $200

The thing is though, these are going to be hard to do an advanced search later on.
Say I want to allow my users to find bingo sites that have a deposit bonus of above $150 from the database, problems will happen in that any information can be inputted in the field. For example I may accidentely write “100” in one and “$100” in another which will undoubtedly cause problems with the search. I am therefore looking for custom fields where are fixed and have select choices like radio selections and can be added easily.

Is this my solution>?
http://wordpress.org/extend/plugins/advanced-custom-fields/

I tried it but no luck and could not make it work to use what I wanted. Can anybody suggest anymore or is there even such a thing?

Happy Blogging.
Regards, Matthew