I've shot my 45acp 1911 for years and have approximately 40k rounds through it. I also recently bought a 1911 in 9mm, a Taurus PT1911, and like it as well. They are very much alike but there are some differences between them as well.
For starters, I think that 1911s in 9mm are a great idea. There are very obvious reasons that 1911s in general are popular. They can have great triggers, easy to customize, feel good in the hand, easy to make accurate, etc. All a 9mm chambering does is make it cheaper to shoot. Ignore the traditionalist. No one is saying that John Moses Browning is rolling in his grave because someone chambered the High Power in 40S&W. Also, as someone else has mentioned, 9mm 1911s have a niche in competition shooting, specifically IDPA ESP. As Vice President, Match Director and CSO of an IDPA club, I'll be the first to say that IDPA has never figured out power factor, and there is no competitive benefit to shooting major.
When I first started shooting my 9mm though, I thought the gun felt very sluggish. I still think that is true, as a small cartridge is pushing back a large steel slide, which in turn is being pushed back into battery by a fairly light recoil spring. Recoil itself is nada, but the gun does feel sluggish compared to other 9mm guns I have shot.
I'd recommend either a Springfield Range Officer in 9mm (not commander size, I understand) or looking at the entry level tier like the Filipino guns or a Taurus. 1911s can very wildly in price and often little to none of it affects shootability, and sometimes not that much of it affects fit and finish either. Unless you have a dream gun in mind, and won't be happy with anything else, I wouldn't recommend spend more than $800 on a 1911.