the soda kegs are definitely more popular amongst homebrewers, though sanke kegs are becoming more popular, for the reasons you stated. You definitely don't have to worry about leaks as much with a sanke keg, but you have a smaller opening, you have to deal with the flat spring/ring, etc. Also, sanke kegs of the size you need will either be difficult to find, or just very expensive. If you aren't going to need too many kegs, it isn't too bad.
With that said, I use soda kegs. I have around 100 kegs (currently have over 70 in the walk-in), and have no plans of switching to sanke. I do have a submersible pump that I could use to clean them, but for me, and how many kegs I am using, it just isn't practical or affordable. There are a couple brewers in the club I am a part of that have switched to sanke kegs for serving, they just had too many issues with the soda kegs sealing properly, and they are very happy with sanke kegs.
There are also many in our club that use sanke kegs for fermenting, but that is a different conversation.
What you need to figure out is what are your priorities (ease to purchase, cost, cleaning, etc.) and how many kegs you plan on using. This will give you a better idea of what is most practical for you.