Hi Emma,
Here is a link to a map of the resort: www.clubairtravel.co.uk/maldives/conrad/
Obviously all of the DBVs are exactly the same, but those on the 100 side of the island - i.e. rooms 124-140 as the west facing rooms. Rooms 124 to about 128 and rooms 136-140 (approximately) have an ever so slightly restricted view due to the location of Rangali Island and the Spa Retreat - you can see that on the map.
If you want a villa slightly set back then i would ask for any between 131-40.
For the best views I would go for 129, 130, 135 or 136 as these are slightly closer to the beach so give a better view.
You may also want to consider whether you want a long pool or a round pool (if you will even you it) - you can sort of see which do and which don't on the map (the round dark brown dots in the front gardens are the round pools and the long yellow rectangles in the front are the long pools).
Good luck on deciding!
L x