It really depends on what you want your bamboo to do. There are screening types that typically grow very dense by spreading fast with lots of culms close together such as bissetii, rubromarginata, propinqua beijing, and the aureosulcatas.
If you are looking for ornamental bamboos to grow as a grove, it will probably be more desirable to have a bamboo that grows well spaced fatter culms that have a larger size potential such as dulcis/shanghai 3, atrovaginata, parvifolia, prominens, & iridescens.
Another common mistake if you are not familiar with the hardiness of bamboo is that a lot of people will choose, moso, henon, vivax and bambosoides just for their size potential and rated hardiness, but these giant timber bamboos are often considerably less hardy than some of the medium sized species that have a size potential of 30-40ft by 3 inches, and might only reach 1/3 their listed size due to winter damage.
Another thing you can do is to get 1 very rare species of bamboo such as bambusoides richard haubrich which is not another green phyllostachys, and desirable by a lot of people so you can trade plant with forum members for plant for the other bamboos you want. I'm out of divisions on pretty much everything now so I might not be able to provide much, but if you go on a road trip to someone who has a bamboo collection, I'm pretty sure you can pick up a lot of good plants, especially if they have a lot of species. Getting good divisions is worth a long road trip.