HRM recommendation

sweetpea7441

Hi. Can anyone recommend a good, but not crazy expensive HRM for me please? Had a look at amazon UK and they vary from about 30 pounds to over 200 pounds! I'm more the 30 pound end... Don't mind spending money on something like this, but must be within reason.
Is the watch type best? Also saw finger ones, can't believe thats nice to have on while exercising.
Thanks!
xxx