Moving to a 1×10 shouldnt make any detrimental difference to how often you drop your chain. In fact as you will be able to run a shorter chain it will most likely improve the situation. If you can count the number of times you have dropped a chain on one hand then you will probably be fine with the front mech locked out, although it will be a lot noisier than fitting a ‘proper’ top guide.
Most chains drop off the bottom rather than the top so a top guide only isnt going to work for everyone, it depends on how and what you ride. The new clutch mechs are designed to help stop the chain coming off the bottom of the front ring so coupled with a top guide will probably work for the majority.
A full guide pretty much guarantees you wont drop a chain, however the trade off is a significant increase in added pedalling friction, in other words its harder to pedal a bike with a full guide than with a top only guide. Having said that you cant pedal at all with no chain!
Lots of choices, but it really is down to how, where and what you ride. Fitting a full guide will give you more choice, you can run it with the lower roller for the DH days, then remove it for the long pedally days if you so wish. The trade off here is a full guide is extremely expensive compared to a top only one.
Finally should you decide to fit any type of chain device make sure you are not using a mineral spirit based chain lube, as this will react with the plastics in the chain device and cause it to fail. Tell tail signs of this are small cracks appearing next to bolts.