The ColorMunki is good enough to start with in that it simplifies the process of color management as much as it can be. Example being the number of patches it uses for printers - which is practically nothing. Likely one reason why it doesn't do a very good job. There's only 100 total on those two target sheets, and a decent profiling patch set should be at least 500. I use 3000 because the i1 iSis makes it so easy.
Get a handle on the process and then move up in maybe 6 months to a year. Whatever you're comfortable with.
The less expensive route will save you about $1800, and you'd still be able to profile your monitor, digital projector and RGB printers. After doing enough of them with a DTP-22 many years ago, it got really tedious reading in printer patches one at a time. Took hours to do one profile. Got an autoreader (like the i1 iSis) as soon as I could afford one.
Another optional piece with the i1 Pro 2 is the i1iO, which mounts the i1 Pro 2 onto an automated arm so you don't have to hand read the patches. But that alone costs about $2500. May as well just get an i1 iSis.
As a suggestion, the default monitor settings for photo work are a 5500K white point, and a 2.2 gamma. I can't guess what nitwit, or group of them decided a 6500K white point should be the default. Almost no one in the world views a very bluish gray balance that way in natural lighting. The most commonly measured white point is 5300K. You will have FAR better luck matching your prints to the monitor when you aren't using such an outlandishly and unnatural white point as 6500K