Re budget: how long is a price of string? All kinds of watches use that movement from Breitling to small boutique brands so the price will vary from a few hundred to thousands. Sometimes the more expensive brands will use Top or chronometer grade ETAs sometimes not.
I would be looking at buying a watch I like rather looking to ensure the movement is a particular off the shelf movement. Most mass produced movements (ETA, Soprod, Seiko, Citizen) deliver good timing performance. One issue re ETA is availability of parts for servicing, this may be worth considering in the long term.