Just my personal experience of using HP Pro Curve (for over 10 years now), I've never had any issues with them, right through the range, POE and none POE. Our entire network infrastructure is HP Pro Curve and I'd recommend them to anyone.
As for a little 5 porter, I have a 2915-8g on my desk that I use for AP setup, etc and have no issues with it. We have multiple VLAN's across staff, student, BYOD, Management and system management based networks, and they all work fine with our ranges of Pro Curve devices.
Around 8 years ago, the previous network guy here made a conscious decision to remove everything Cisco related after we had various issues at the time, when the Cisco engineer turned up (several of them), not even they could resolve the problems.
Just my experiences, that's all, I know others feel different, but I can't say a bad word about HP devices, especially their lifetime warranty.
(and we have the R510's too).