I've been collecting and trading watches for more than 20 years. I even moderate a watch forum (whoa...I know, exciting right??). If 3000 is your budget don't go with Tag or CW. In terms of buying a watch, either go with grey market (deep discounts, like Jomashop over here in the USA) over authorized dealers, or if you go to an AD (authorized dealer) be SURE to ask for their lowest price. Do not pay what the price tag says. There is also a huge market for used watches on respected watch forums, such as watchnet.com and watchuseek. If you go that route, please message me and send me a the ad, as I can tell a good deal from a bad, or even a scam. Usually, you can find great deals on used watches, which is what I do. But the stress of dealing with an unknown seller can be a turn-off, as can waiting for the watch to arrive safely via the post. Don't rush into a purchase. Also, consider your wrist size relative to the diameter of the watch and thickness of the watch. If you have smallish wrists, a watch like a Seamaster Professional Chronograph (Omega) will look quite bulky on your wrist since it is 44mm across and 16mm thick. Dress watches are traditionally in the 38-40mm diameter range.
Almost all watches are poor investments, despite what people have said here. The top three brands that hold their value are Rolex, Cartier, and Patek Philippe. Another brand A. Lange & Sohne is also creeping up in value. All other watches, when bought new, will be worth about 50% of their value about 6 months out. This is why the used market is so attractive. Some watches, if you hold on to them long enough will go up in price, but usually this is only on paper, not in practice--this is to say, if you buy a nice watch for 1000 and hold onto it for 10 years, the newest model of that same watch might now cost 3000, but this doesn't mean your own 10-year old watch is now worth 3000. You would never get 3K for it on the used market.
Some recommendations:
Look at Nomos, which is a well-respected German company that uses in-house movements.
Look at Tudor, a great company with old ties to Rolex
Used Omegas are still excellent
Frederique Constant also uses in-house that matemovements in some of their watches
Damasko also uses in-house movements in some of their watches