[mhax]

I'm a little wary of a monolithic solutions to monitoring/graphing/time series data storage - it gives me flashbacks of nagios/zabbix ;)

I currently use a combination of sensu/graphite/grafana which allows a lot of flexability (albeit with some initial wrangling with the setup)

[gambiter]

I'm not sure what's wrong with nagios or zabbix... I use them both in different capacities, and they are good at what they do.

Of course a piecemeal solution is more flexible, but as you said, configuration can be a beast, so many people prefer monolithic systems.