Yes that is quite possible, and a good way to do things. Generally, monitors have better resolution as compared to TVs. But since this is an interim measure, it is fine.
Wich monitors are superior to 1080p? thats 1900x1080, right? Is there a 2600x1500?
Regarding the question, you can very well get a HDTV and use it regularly as a monitor. Im using Haier 1080p 22" and at that size, I run a 1600x900 resolution.