I'm also taking Santogen Mother To Be, but I got the double pack Mother and Father to be for under £15 at Boots. Was much cheaper than the pregnacare/wellman duo.
Before that I was just taking Tesco's own women's complete vitamins, which had everything in it and at £3.50 it was quite a steal!
I'm fine now at remembering my vitamins, been taking them every day for nearly a month now, but DH has had his since Monday and only taken them once as far as I know! I hate nagging him but his memory's terrible. Any tips?!!