Over the next 4/5 months we will be receiving several sterling cheques from 15k to 35k we are with 1 of the big 3 banks but we are not always happy with the conversion rates what other options do we have. thanks
At those amounts, you should be able to get something better than the "over the counter" rate: try asking beforehand with your account manager. It seems to be one of those things with banks where if you don't ask, you won't get. This is based on experience of dealing with one of the big 3 banks and US$ amounts $10k to $50k or so.