Did you shoot one? Did you like handling, sights, accuracy, trigger pull and feel, weight and so on? If you did and do - go for it. It should be a solid reliable gun.
Also consider - availability of extra mags, holsters if you wanna compete and parts if you plan on upgrading sights and so on.
Glock would offer the best selection with reasonable prices. M&P is a good choice and offers a few options, accessories are becoming more available too. XDm is a nice gun but it's in vacuum of support in Canada as of now. For metal-framed guns, CZ is a good choice, with reasonable prices, good support for parts and accessories.
I personally am partial to CZ, there are several upgrades available, and one can have a very nice shooter out of any CZ75/85/SP-01. CZ provides nice platform you can build on, like 1911.
If you don't plan on making any changes to the gun - Ruger SR9 will serve you well and last too. There is nothing wrong with it, thou many more experienced shooters will be quite picky and may not approve your choice
My opinion was based on understanding you are after 9mm gun that is cheaper to buy and to feed, is light and has small-ish grip... So I didn't cover what'd not apply
