Congratulations on your pregnancy, Dipsy. I'm going to go the middle road and say, 'go with your gut'.
If you would like to have a scan and see your baby - go for it! I can totally understand this desire.
For me, I didn't have the NT scan last time and I wont this time. I'd love to see my baby but I choose to just have the one u/s in my pregnancy (provided it looks ok and subsequent scans are not required). This is a personal decision and one I'm struggling with this time round. I'd love to know that all is ok with my bubs, but I'm going to have to trust the doppler at my booking in appt.
If you feel the scan wouldn't make any difference to you, don't have it. Simple as that. On the other hand, if you would like to have it just for the hell of it, have it. Don't let your OB complicate the issue with 'further testing'. Decide on this one first, then deal with 'further testing' if and when it arises. That's the way I consider it, anyway.
GL with your decision.