No, orchids don't overwhelm you with their fragrance, certainly nothing like paperwhites. In an enclosed space, such as a small greenhouse, you would be able to tell when a fragrant flower was there though. I have some that are more strongly fragrant, such as the 'Elmhurst' and 'Emerald Isle', but even then, there have to be multiple flowers all in bloom at the same time to be noticeable. Some orchids, such as the B. nodosa is fragrant, but that fragrance is noticeable (at least to me) at night. That's because the insect that pollinates the nodosa is a nocturnal insect. Isn't Mother Nature clever!
If you really want to give yourself an edge, particularly when you are just getting into orchid-growing, I would always recommend a blooming size plant, one that has plenty of leaves and plenty of roots. Several of the ones you show are only "teens", which means they are still seedlings. I would not recommend that size until you have some experience under your belt. What you choose is also dependent on your growing conditions as well as whether you want something that needs misting/spraying every other day or so. Mounted ones dry out very quickly and thus need more frequent "showers". But the flip side is that it is extremely hard to over-water a mounted plant, and over-watering (as well as the wrong media) kills far more orchids than all other causes put together. I do have some orchids that are really hardy, really fast growing, and really tolerant to a bit more neglect.
Let's use the T-Mail for specific discussion if you have interest.
..orchids acclimate as they grow in your area once you get the hang of it. We have such varied micro climates..in my area cymbidiums are good outdoors year round, in triple digit summer heat as long as watered well and given some shade during the hottest part of the day or during winter, since our winters are milder and we get cold valley inversion. I have always found Oncidium alliance orchids easier to grow 
